How can you tell if a toy is too small for your young child? Dr. Nkeieu Orajiaka has a tip for you on her TikTok account.

A pediatrician and mom, Dr. Orajiaka says a simple toilet paper tube can help parents determine if a toy is a choking hazard for kids under 3. If it fits through the tube it could also fit in a child's throat and pose a choking hazard.

Check out this TikTok that has now been liked more than 40,000 times.

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Check out more tips from Dr. Orajiaka on Motherly.

Editor's note: this story was originally published on January 19, 2021.