Question Ball
Take a beach ball and have kids write questions on it. Or write all the questions yourself. These can be serious, funny or a mixture of both. These questions should be fairly general and spark conversation. Everyone sits in a circle and one person starts by tossing the ball to another person. That person catches it. They must then read the question written under their right thumb and answer. They toss the ball to someone else and play continues. This one will get kids talking and laughing as they learn new things about one another.
Scavenger Hunt
Have a scavenger hunt. Consider a scavenger hunt with a twist such as a photo scavenger hunt where you have to take photos of items or a video scavenger hunt where each team must videotape the things, situations and scenarios listed on the paper. Choose whatever is most appropriate and feasible with your group of youngsters.
Twister
Get out Twister and let the kids get silly with some good twisting fun. The rules are simple; just put your designated body part on the correct color as it is spun and don't fall down in the process. See who comes out the Twister champion and then play again to give someone else a chance.
Dance Party
Kids of all ages love to dance. Clear a space where the kids can turn on their favorite kind of music and dance away. If you don't have a radio close by set up an iPod with speakers attached to a docking station. Or even turn on the television and look for some music videos. Another option is to bring out a karaoke machine and let kids take turns belting out their favorites while the others laugh and dance along.
Manicures and Pedicures
Girls love getting pampered. Bring out the nail polish, clippers and toe spacers so your tweens and teens can take turns giving one another manicures and pedicures.
Wii Sports Tournament
If you have a Wii video game unit then start a sports tournament. The sports games are user friendly so even someone who has never played before can get the hang of things and stand a fighting chance. See who can knock down the most pins in Wii bowling, take a couple swings in the baseball game, swing your racket in tennis, vie for longest drive in golf or challenge the others to a whole different sport and trade off for playing the winner.