Now, use a semi-transparent nail polish to make stripes or another design down the sides. Add a solid border using metallic nail polish and you have a very funky pencil holder for anyone's desk. Save old or ruined CDs and turn them into beautiful mobiles for your baby. You don't have to be fancy, just stripes and dots will do. Now tie strings to the cds and hang them at varying hights from a coat hanger.
Nail polish is also very useful for color coding.
If you have several people living in a house, color coding is invaluable to keep belongings seperate. Each person chooses a color and then just dabs a bit on each of their things. This is especially useful for boxes of food in the cupboard and items that look alike, such as Walkmans or combs. Speaking of combs, you can quickly spruce them up with old nail polish. Just add flowers or stripes down the back edge.