
Learn somethingGood for siblings
Foil Boat Bath Test
Build a foil boat and see how many coins it carries before it sinks.
- Ages
- 5–12 yrs
- Play
- 15–30 min
- Prep
- 2 min
- Mess
- barely any
- Energy
- calm
- Where
- in the bath
You’ll need
Things you probably have at home.
- a bath
- foilGet it on Amazon
- coins, buttons or paper clips as cargoGet it on Amazon
How to play
Tear a square of foil for each builder, the same size.
Fold it into a boat any shape you like.
Float it and add cargo one piece at a time, counting out loud.
When it sinks, write the number down, then build a better one.
What it helps with
Keep it safe
- Coins are a choking hazard. Keep them away from little siblings in the bath.
Make it different next time
- Same foil, three different shapes: which carries most?
- Guess the number before loading.
Cleanup: Squash the foil into recycling and dry the coins.


