It is used as insulation, seat foam, packing foam, in couches. Break the girls into groups of 2 or 3. Have each group make polyurethane foam. This is done by putting equal amounts of mixtures A and B in a foam cup and stirring rapidly. Discuss the heat that is generated during the processing.
Slime is for fun.
Slime is a crosslinked structure, but the crosslinks are hydrogen bonds and thus can break and reform easily. This gives the mixture the flow properties and the bouncy properties that it exhibits. At short times, the bonds don't break and it bounces. To do this, boil water in a hot pot and make sure the temperature stays above 80oC while holding the wires straight. Then have her hold the wire in boiling water.