For you to do
You'll tape ramps and tubes to a wall or board to guide a marble from top to bottom. The goal: make the trip as slow as you can while keeping the marble moving the whole way.
Grown-up help
All on your own.
Build version 1
Make a quick first track — your **prototype**. Don't aim for perfect; aim for finished, so you can test it.
Test and improve
- Run the marble. Where does it stop or fly off? Fix that one spot.
- Add a gentle zig-zag to slow it down — but too flat and it stops. That's a trade-off.
- Keep a tally of how many versions it takes to get a smooth slow run.
What's happening
Push further
Add a loop, a jump, or a 'catch' that drops the marble into a cup at the end.
Gravity pulls the marble down (a **force**), while ramps redirect it. Each rebuild is an **iteration** — engineers almost never get it right the first time. Slower runs need gentle slopes, but go too gentle and friction wins. Finding that balance is the whole game.