This fun and interactive lesson will teach your students the scientific method to find out if something sinks or floats with a little help from Cookie Monster.

Use this lesson to show your students the different types of solids, liquids, and gases. Show them how a solid turns into a liquid and how a liquid turns into a gas by using real life examples.

This hands-on lesson will get your students to investigate some mystery liquids, and they will have to use their observational skills to figure out what they are.