Moonsand = 8 cups flour + 1 cup baby oil.... I make this for the kids all the time and they love it!
Kool-aid FOAM! Gloriously scented, delightfully fluffy, and irresistibly squishy fun for kids! Oh, and the best part is that you can most likely go into your kitchen and make this RIGHT NOW; it is so easy!
Huge list of activities to do for ages 1-4