Makeover
Allow the kids to give you a "makeover" using some of the makeup in your bag. Better yet, write a few glamorous professions on small pieces of paper, and put those pieces of paper into a hat or basket. The kids can take turns drawing out a profession, like "Actor," "Fashion Model" or "TV Show Host"; the other kids then get to give the one who pulled out the paper a makeover to look like their favorite star from that profession. Makeovers can range from conservative and pretty to wild and wacky.
Blind Makeup
For those who are feeling brave and want a new kind of game to play while using their old makeup, they can try the blind makeup game. This game is played by separating the different kinds of makeup that you have into categories--such as mascara, lipstick and eyeshadow--and placing them into different small boxes. Next, blindfold the makeup artist, who then tries to do another player's makeover by reaching into the different boxes and applying the makeup. It's hilarious to see the end result. Remember to keep some makeup remover on hand for easy clean-up.
Online Makeup Games
If you don't want the kids playing with your makeup or just don't feel up to the clean-up it may entail, direct your kids to the computer, where they can play a variety of makeup games online. They can give their virtual models any kind of look, and then clean it up with a click of a button. Some websites even allow you to change the hairstyle and clothes as well as makeup, so that you kids can create a whole new look. They can even choose to make over a favorite celebrity. See Resources for makeup game websites.