Review on Trideer Exercise Multi-Function Kids Small (Ages by Terrance Palau

Still holds up well for four weeks of heavy use by an active 7 year old. It was scary to inflate as I expected it to burst. To get the recommended size, I had to convert the height given to the actual girth of the ball and use a tape measure to make sure I wasn't over inflating it. I kept blowing air (no manual pump, I need an electric pump) even though it seemed fully inflated until it got to the right size. This made it the advertised size and strong enough to bounce and sit well.