Teams build the tallest free-standing tower from spaghetti, tape and string — with one marshmallow that must sit on top.

How to run it

1. Split into teams of 4–5. Give each: 20 sticks of spaghetti, 1 yard of tape, 1 yard of string, 1 marshmallow.
2. They have 18 minutes to build the tallest free-standing structure with the whole marshmallow on top.
3. You time it and measure — but never help during the build.
4. Spend 10 minutes after on what the winning teams did differently.

Source & full detail: Oak Innovation ↗