What are the waffle like bruises on my childs' back and shoulders? The trampoline will at times break blood vessels on the shoulder blades and back. This is due to improper landing positions during Back Drops. Don't be worried it is very common and will go away with time.
My childs' lower back is sore... This also is a very common low level injury in beginners when they take up learning trampoline. The muscles used to support the upper body in day to day life are used a great amount during trampoline. It is normal for these muscles to be sore after prolonged use while the body adapts to the jumping and motion. With time and exercise this discomfort with go away.
My child comes home with knees and elbows scraped... Although we take every precaution to ensure the athletes safety, crashes are inevitable. The trampoline will occasionally give an athlete 'tramp burn' very similar to rug burn. It will sting for a day and then develop a scab while the body goes about its maintenance in healing.