An active, sports-themed birthday party -- whether it's bowling, skating, paintball or miniature golf -- makes managing a large group party easy. Book time at a local sporting club, rink or court, bring some food and music, and game on!
Of course, keep safety in mind. Make sure there will be a lifeguard or referee on hand and all kids' parents are comfortable with the planned activities. For younger kids, set up the Olympics in your yard or a local park and include events such as jump rope and relay races.
Watching from the sidelines can be a blast, too. Instead of playing a game, get tickets to one! Minor league or local games are always a good bet and won't break the bank, either. Just don't forget to budget for hotdogs or popcorn.