can anyone help me with this, i mean i know how to make a kicker and that, but do i literally just use old matresses ect for the softness and then put plastic on the top?
Well, it's plastic sheeting not just film. The plastic sheeting that will deal with the abuse will be pricey.
thats what i was thinking. so can you make a jup box, cover it in matresses and foam , get the plastic sheeting and youwill then have what i am after? obviously you will have to make the lip a bit taller to get above the soft stuff.
You would not have to, a bit of a step up is always cool. You don't even need the soft stuff, just use 2x6" boards on the flat for the landing. they will be pretty springy. Depends on what you want.