WATCH: The best toys for kids make use of their imaginations, not a screen

  • Now Playing: The best toys for kids make use of their imaginations, not a screen


  • Now Playing: Two blood pressure medications pulled in heart-drug recall


  • Now Playing: Younger school entry linked to ADHD diagnosis: Study


  • Now Playing: Teen left in tears as her classmates reveal she’s cancer free


  • Now Playing: Studies show women who snore pose greater cardiac risk


  • Now Playing: US life expectancy drops for 3rd year in a row


  • Now Playing: Deborah Norville of ‘Inside Edition’ shares how she dropped 30 pounds


  • Now Playing: Doctor behind first genetically modified babies: ‘I feel proud’


  • Now Playing: Researcher in middle of gene controversy defends his work


  • Now Playing: Number of cases of AFM nearly doubled in the last month: CDC


  • Now Playing: Romaine lettuce from California linked to E. coli, FDA says


  • Now Playing: How to use fats and oils for healthy hair, skin


  • Now Playing: New cancer treatment credited for saving the life of 9-year-old boy


  • Now Playing: American professor investigated for involvement in genetically edited babies


  • Now Playing: What is ‘bloating’?


  • Now Playing: Chinese researcher claims to have made 1st genetically edited babies


  • Now Playing: Refocus on health after the indulgent Thanksgiving meal


  • Now Playing: ALS researcher living with the disease still fighting for a cure


  • Now Playing: Imagining your fears can help you conquer them


  • Now Playing: Maryland college student dies of adenovirus