If you know of anyone that has a pool or an apartment w/a pool that would allow you to have it there that would be the best, especially with this darn TX heat. My cousin was nice enought to let us have my Hubby's 40th at her place last year. We rented some tables and had a few pop up canopies for shade. Kids swam and we had a Keg then I asked for people to bring their favorite Bottle of whatever in leiu of gifts. So then I just provided the mixers for that. Then had "make your own tacos bar. That was cool. I also did a big crock-pot of queso cheese so they could make taco's or nachos, then we had a few tables set up inside for the older folks and had some card games available. Then we used my hubbys Ipod that has like 2,000 songs on it and hooked it up for the music. All in all it was a great party. And the only expense was the tacos, queso, the mixers, paper products and I did a big water-cooler of lemonade. Oh and the keg and some bags of ice! Sister-in-law provided the cake! If you are not lucky enuf to have a swimming pool, the just move the party to a little later in the evening and have the living room set up as a game station for the kids to play wii and other crafts or games to keep them busy and have card games, music, jello-shots are always fun and that should be sufficient. Like somelse said adults can entertain themselves!