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Learners see that a carrot slice sinks in fresh water and floats in saltwater.

In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.

Learners carefully pour vegetable oil, water, and corn syrup in any order into a cup and discover that regardless of the order they are poured, the liquids arrange themselves in layers the same way.

In this activity, learners explore engineering package designs that meet the needs of safely shipping a product.

In this activity, learners explore how product design differences can affect the success of a final product -- in this case a bag for holding candy.

In this math lesson, learners rotate through six estimating and measuring centers. First, learners read the book, "Room for Ripley" by Stuart J.

In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.

This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio.

In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

Learners see that a can of regular cola sinks while a can of diet cola floats. As a demonstration, bubble wrap is taped to the can of regular cola to make it float.