Ranger-led kids programs are available in the park daily during summertime. The hour-long programs include crafts, educational talks and other activities, which vary. Children must be accompanied by an adult, so you’ll have to attend with your little ones (it’s a great way to meet other parents who are vacationing at the park). Reservations are required, and you can sign up at the Visitor’s Center before you go. The best part? The programs are free!