I'm throwing a suprise sweet 16 for my sister and its in a month. I was thinking of playing truth or dare. Maybe some water balloons and water gun fight. Mayb a scavenger hunt would be kinda fun too. But i dont know it thats immature. It could be really fun. I looked at a bunch of stuff on google to plan this party. Check out party411.com for more ideas. That cite helped a lot. The games might depend on the theme of the party too. Hope i helped and i hope the party goes well.