Menu

The volcano effect: Why skipping a nap results in a meltdown

Naps build up a reservoir of sleep-related benefits, allowing kids a ‘fresh start’ after each sleep period.

The volcano effect: Why skipping a nap results in a meltdown

From the moment your child wakes in the morning, he is slowly using up the benefits of the previous night's sleep. He wakes up totally refreshed, but as the hours pass, little by little, the benefits of his sleep time are used up, and an urge to return to sleep begins to build.


When we catch a child at in-between stages and provide naps, we build up his reservoir of sleep-related benefits, allowing him a 'fresh start' after each sleep period.

As shown below, as children age, the length of time that they can stay 'happily awake' increases. A newborn can only be awake one or two hours before tiredness sets in, whereas a 2-year-old can last five to seven hours before craving some down time for a nap.

When children are pushed beyond their biological awake time span without a break that's when they become fatigued, fussy and unhappy.

As the day progresses, and the sleep pressure builds, a child becomes fussier, whinier and less flexible. He has more crying spells, more tantrums and less patience. He loses concentration and the ability to learn and retain new information.

The scientific term for this process is homeostatic sleep pressure or homeostatic sleep drive. I call it The Volcano Effect. We've all seen the effects of this on a baby or child, as it is often as clear as watching a volcano erupt—nearly everyone has observed a fussy child and thought or said, Someone needs a nap!"

As a child progresses through his day, his biology demands a sleep break to regroup, refresh and repair.

If a child does not get this break the problem intensifies—the rumblings and tremors become an outright explosion. Without a nap break, the homeostatic pressure continues building until the end of the day, growing in intensity—like a volcano—so that a child becomes overtired, wired and unable to stop the explosion.

The result is an intense bedtime battle with a cranky, overtired child, or an infant who won't fall asleep no matter how tired you know he is.

Even more, a child who misses naps day after day builds a sleep deprivation that launches her into the volcano stage much easier and quicker. If she is missing naps and also lacking the right quality or quantity of nighttime sleep…watch out!

Newborns and young babies have a much shorter span in which their sleep pressure builds. They rapidly reach the peak of their volcano in one to three hours. This is why newborns sleep throughout the day, and why young babies require two or three or four daily naps.

Over time, as a baby's sleep cycle matures, he will be able to go longer periods between sleeps. It is not until age 4 or 5 that a child is able to go happily through the entire day without a nap, and sleep research suggests that even through adulthood a midday nap or rest break is extremely beneficial in reducing the pressure in all human beings.

The Volcano Effect is not something reserved only for children! This biological process affects adults as well. Understanding this can help you interpret what is really going on in your home at the end of a long day, when children are fussy and parents are grumpy—resulting in a whole mountain range of volcanoes.

Sleep pressure can be exaggerated by environmental issues such as the previous poor night's sleep, on-going sleep deprivation or daily stress.

What's more, each person's moodiness feeds off the others, causing contagious crankiness. And then you'll find yourself losing patience and saying to your child, “I'm sorry, honey. Mommy's just tired right now." (This is a very telling explanation we don't often stop to analyze.)

This volcano concept brings to light one more important point—quality naps can make up for lost night sleep, but extra nighttime sleep does not make up for missed naps, due to the homeostatic sleep pressure concept.

Therefore, no matter how your child sleeps at night, his daily naps are critically important to release the rising sleep pressure.

From The No-Cry Nap Solution: Guaranteed Gentle Ways to Solve All Your Naptime Problems by Elizabeth Pantley (McGraw-Hill, January 2009).

10 must-have registry items that will change your life, mama

The baby gear heavy hitters that should be top of your list

Calling all mamas-to-be! It's a fundamental truth of (impending) motherhood that your prepping-for-baby To Do list can feel a mile long, but really the best way to feel organized is to sort out the most important item at the top of your list: your registry. Sure the items you choose to include will end up running the gamut from nice-to-haves to absolutely essential game-changers, but mamas in the know quickly learn one thing: Not all baby gear is created equal.

So while you can and should pepper your registry with adorable inclusions that aren't necessarily can't-live-withouts (go ahead, add 'em!), you should make sure you're ticking the boxes on those pieces of baby gear that can be absolute life savers once you're in full-blown mama mode. From car seats to bouncers and playmats, your play and travel gear will be some of the most obvious important items on your list, but so can unexpected things, like a super comfy baby carrier and a snooze-inducing white noise machine. So to help you sort through the must-have options, we turned to the holy grail of motherhood that is buybuy BABY and handpicked 10 of the very best essential pieces that will change your life, we promise.

Keep reading Show less
Our Partners

14 outdoor toys your kids will want to play with beyond summer

They transition seamlessly for indoor play.

With Labor day weekend in the rearview and back-to-school in full swing, most parents are fresh out of boxes to check on their "Fun Concierge" hit list. It's also the point of diminishing returns on investing in summer-only toys. So with that in mind, we've rounded up some of our favorite toys that are not only built to last but will easily make the transition from outdoor to indoor play. Even better, they're Montessori-friendly and largely open-ended so your kids can get a ton of use out of them.

From sunny backyard afternoons to rainy mornings stuck inside, these toys are sure to keep little ones engaged and entertained.

Meadow ring toss game

Plan Toys meadow ring toss game

Besides offering a fantastic opportunity to hone focus, coordination, determination and taking turns, lawn games are just plain fun. Set them up close together for the littles and spread them out when Mom and Dad get in on the action. With their low profile and rope rings, they're great for indoors as well.

$30

Balance board

Plan Toys balance board

Balance boards are a fabulous way to get the wiggles out. This one comes with a rope attachment, making it suitable for even the youngest wigglers. From practicing their balance and building core strength to working on skills that translate to skateboarding and snowboarding, it's a year-round physical activity that's easy to bring inside and use between Zoom classes, too!

$75

Detective set

Plan Toys detective setDetective Set

This set has everything your little detective needs to solve whatever mystery they might encounter: an eye glasses, walkie-talkie, camera, a red lens, a periscope and a bag. Neighborhood watch? Watch out.

$40

Wooden doll stroller

Janod wooden doll strollerWooden Doll Stroller

Take their charges on a stroll around the block with this classic doll stroller. With the same versatility they're used to in their own ride, this heirloom quality carriage allows their doll or stuffy to face them or face the world.

$120

Sand play set

Plan Toys sand set

Whether you're hitting the beach or the backyard sandbox, this adorable wooden sand set is ready for action. Each scoop has an embossed pattern that's perfect for sand stamping. They're also totally suitable for water play in the wild or the bathtub.

$30

Water play set

Plan Toys water play set

Filled with sand or water, this tabletop sized activity set keeps little ones busy, quiet and happy. (A mama's ideal trifecta 😉). It's big enough to satisfy their play needs but not so big it's going to flood your floors if you bring the fun inside on a rainy day.

$100

Mini golf set

Plan Toys mini golf set

Fore! This mini golf set is lawn and living room ready. Set up a backyard competition or incorporate into homeschooling brain breaks that shift focus and build concentration.

$40

Vintage scooter balance bike

Janod retro scooter balance bike

Pedals are so 2010. Balance bikes are the way to go for learning to ride a bike while skipping the training wheels stage altogether. This impossibly cool retro scooter-style is built to cruise the neighborhood or open indoor space as they're learning.

$121

Wooden rocking pegasus

plan toys wooden rocking pegasus

Your little will be ready to take flight on this fun pegasus. It gently rocks back and forth, but doesn't skimp on safety—its winged saddle, footrests and backrest ensure kids won't fall off whether they're rocking inside or outside.

$100

Croquet set

Plan Toys croquet set

The cutest croquet set we've ever seen! With adorable animal face wooden balls and a canvas bag for easy clean up, it's also crafted to stick around awhile. Round after round, it's great for teaching kiddos math and problem-solving skills as well.

$45

Wooden digital camera

fathers factory wooden digital camera

Kids get the chance to assemble the camera on their own then can adventure anywhere to capture the best moments. With two detachable magnetic lenses, four built-in filters and video recorder, your little photographer can tap into their creativity from summertime to the holidays.

$179

Wooden bulldozer toy

plan toys wooden bulldozer toy

Whether they're digging up sand in the backyad or picking up toys inside, kids can get as creative as they want picking up and moving things around. Even better? Its wooden structure means it's not an eye sore to look at wherever your digger drops it.

$100

Pull-along hippo

janod toys pull along hippo toy

There's just something so fun about a classic pull-along toy and we love that they seamlessly transition between indoor and outdoor play. Crafted from solid cherry and beechwood, it's tough enough to endure outdoor spaces your toddler takes it on.

$33

Baby forest fox ride-on

janod toys baby fox ride on

Toddlers will love zooming around on this fox ride-on, and it's a great transition toy into traditional balance bikes. If you take it for a driveway adventure, simply use a damp cloth to wipe down the wheels before bringing back inside.

$88

We independently select and share the products we love—and may receive a commission if you choose to buy. You've got this.

Shop

10 photos to take on baby’s first day that you'll cherish forever

You'll obsess over these newborn baby pictures.

Bethany Menzel: Instagram + Blog

As you're preparing for baby's birth, we bet you're dreaming of all of the amazing photos you'll take of your precious new babe. As a professional photographer and mama, I have some tips for newborn photos you'll want to capture.

Here are the 10 photos you will want to take on baby's first day.

Keep reading Show less
Life