Preschool-aged gymnasts can exercise on a trampoline by doing straight jumps, tuck jumps, straddle jumps and seat drops. Practice simple techniques on a trampoline with advice from a gymnastics coach in this free video on gymnastics. Expert: Andrea Pratt Contact: usagymnasticsworld.com Bio: Andrea Pratt has been training for more than 10 years at Utah Pinnacle and Hunts Gymnastics and coaches at USA Gymnastics World in Bountiful, Utah. Filmmaker: Michael Burton Series Description: The basics of gymnastics include cartwheels, handstands, the splits and stretching. Understand some simple gymnastic warm-ups with help from a gymnastics coach in this free video series on youth sports.