The park offers three Junior Ranger programs. Try one or try them all! The Junior Ranger app for iPhone and iPad gives kids a way to interact with the park's stories on their mobile device. The Junior Ranger Challenge is an opportunity to learn about park stories from home, and kids visiting the park can learn more about the sites using the Junior Ranger Activity Booklet. Kids earn Junior Ranger stickers, certificates, or badges depending on the program. Booklets and badges are not available through the mail.