Superhero Strength: A Science Trick
Think your third grader can beat an adult in a contest of strength? Wow an adult (and your kid) by trying this simple trick that plays with vertical and horizontal forces to make your third grader look like the Hulk. Sounds hard to believe, but no matter how hard you try to keep your fists together, he'll knock them apart every time.
What You Need:
- Adult helper
- Your child's amazing strength