Hey I don't have a child with it, however I have it myself. I found as a child I had severe cramps and was very prone to sprains and strains. And I was one of those people who grossed everyone out clicking their knuckes, only I could click my knuckles, wrists, toes, knee, pretty much everything! and now as an adult I am forever dislocating my shoulders etc. It hasn't really affected me too badly though, I still do everything the average person does!