Launch Sink or Float

Help kids play the sink-or-float game with Grover. Talk with kids about which items sink and which items float, and why that might be.

Then, do your own sink-or-float investigation with toys, food storage containers, and bottles of shampoo. Make a hypothesis, a thoughtful guess or possible explanation, for why something happens about which item will sink or float, then try it out! You might draw pictures of each item in a chart that shows your findings.

What else can you investigate? Start by looking around your home and asking the question, “What do you think would happen if…?”