Summer is a great time for children. School is out for most of them and it's time to play. Running, climbing, building sand castles, swimming... Sweating, sunburns, complaining. It isn't necessarily all that easy to keep the kids busy all summer long, especially on particularly hot days, the days when the kids come into the house five minutes after you send them out, complaining "it's too hot outside!" What can you do to keep them busy, short of turning the AC on full blast, driving ...