My 4 yr old grandson is wearing a splint as we speak because he tried to ride his Flintstone car down the slide. He was ejected from the vehicle when it de-railed 1/2 way down and put his hands out to break his fall. Took him to the ER thinking he broke something. He had popped the ball of his elbow out of socket, which they popped back into place (ouch) and did some soft tissue damage to his wrist.