Why can a tiny kid lift a giant grown-up on a seesaw?
A heavier grown-up or big sibling on the playground seesaw — slide yourself out to the very end and you can lift them; same reason a door swings easy when you push far from the hinges and barely budges near them.
Talk about it
- Guess first: could you lift Dad on a real seesaw? What would you have to do?
- What does the kid trade away to win — what gets harder when you sit way out at the end?
- Can you find something at home that works like a seesaw, where pushing far from the middle makes a big job easy?