My little toddler LOVES to get her fingernails polished. One day we were making some homemade paint and we realized it would work great as pretend nail polish. It was some corn starch and colored water. She really enjoyed "painting" my nails. The corn starch made it dry hard on my fingernails but it washed off with ease. She even got to paint her own nails. This was a super simple activity that entertained her for quite some time.