Sink or Float Experiment

20 mins Ages 4-9 Indoor

A playful, screen-free adventure designed to spark curiosity, sensory exploration, and fine motor skills for kids aged 4 to 9.

Materials Needed

  • • Tub or sink of water (1)
  • • Small household objects (10-15)
  • • Paper and pencil (1 set)

Pro Tips

  • → Let kids predict before testing
  • → Record results on a chart
  • → Try objects of different materials

Safety First

Supervise near water. Use water-safe objects only.

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Step-by-Step Instructions

1

Step 1

Fill a tub or sink with water.

2

Step 2

Gather small objects to test (spoon, cork, rock, leaf, toy).

3

Step 3

Predict whether each will sink or float, then test.

4

Step 4

Sort objects into sink and float piles.

What they are learning

Density Prediction Scientific observation