Juniors are less powerful and therfore can only jump half the height saying that you can still get some high bounces from them. and I've seen a lad flip without JP's on
![Shocked :o](http://www.projumpforum.co.uk/Smileys/default/shocked.gif)
What weight is the person who wants them, has is always best to get a pair 10kg more than their weight !?