Hi! My 12 year old put tumbling mats on her Christmas list...any suggestions for ones that are good for home use? She is a solid level 4 tumbler, working like crazy to get her full at the gym. I wouldn't allow her to do any skills she hasn't mastered yet at home, though. I certainly can't spot her! She and her friends actually took the mattress of her bed last week to tumble on it...didn't strike me as particularly safe or smart so I am looking into this. :) Thanks in advance for any advice.