Well, not our toes, but with as messy as the Lab was we might as well have used our toes! We've been covering properties of matter in 2nd grade, and this week we are trying to change the properties of sand! This field, "materials science", is fascinating! Here Mrs. Teuchert's class demonstrates: 

Here you can check out a video on "materials science" by the folks at Crash Course Kids: 

Our ingredients: mix 1 oz water with a teaspoon of dish soap and some food coloring. In a separate bowl combine 2 oz play sand and 1 oz corn starch. Combine both bowls and mix to desired consistency!