Nothing brings learning to life like real-world experience. This week-long trip’s engaging lesson plan gives kids an education in biology and ecology that can never be found in a textbook. Here, spend the days (and nights!) studying the flora and fauna that inhabit the cloud forest and Manuel Antonio National Park. Elsewhere, get in touch with the land by rappelling, rafting, swimming, horseback-riding, and even surfing all over it. Science + gym? You do the math. Hotels (8 nts).