Adult Tumbling & Trampoline (Ages 14+) - Beginner - Intermediate The Gymkana adult tumbling and trampoline class is a co-ed program for adults interested in learning tumbling and trampoline skills. This class will cover instruction on basic to intermediate tumbling skills, along with instruction on trampoline and double mini trampoline. This session includes 8 class dates between June 10 - July 29.