Boxie’s Sink-or-Float Test!

What You'll Need

  • Large Container
  • Food Colouring
  • Lots of Water
  • Objects will float or sink
  • 60 mins
  • Ages 3 - 6
  • Inside
  • Very Messy
Things that float have ‘buoyancy’
So we’re going to do a test to see,
What stays up and what goes down
Which things swim and which things drown!

Gathering your Materials:

Choose anything small enough to fit into the your container: ping pong balls, golf balls, blocks, kitchen gadgets, sponges, strainers, straws, stones, flowers, corks, confetti … anything mum and dad won’t mind getting wet.

Getting Started:

  • Pick a place with a waterproof floor. In fact, if it’s a nice day why not go outside? Then you can splash about to your heart’s content!
  • Fill the container almost to the top with clean water.
  • Now, take the things you’ve chosen one by one and guess whether it will sink or float.
  • Drop it in the water. Does it sink? Does it float? Who guessed right?

[tip]Children learn best by doing things themselves and they will really understand these concepts if they are allowed to try them out with real objects.[/tips]


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