I was looking for some water based activities for the kids when we have picnics down at the river-point walter etc ,maybe for also down at dunsborough as well

dont want something to tow behind a boat, just something you can peg/rope into a spot on a beach

I have seen kids playing on water trampolines in movies where they have usa holiday camps at big lakes, and was wondering if people have seen these for sale in perth ?

 I assume that it would need the tube to be made from some sailcloth type material that wont rip

we have kayaks and a dinghy, so thought one of these would also be fun ?