The Problem with this is that to make it affordable you would want to have a rental shop next to it so people can rent them out and have some fun. Then you charge entry if you have bocks(at a cheaper price) and then if they dont charge more!!!!
This is a idea that could work but where would you build it?
best would be inside then as weather wouyld never effect it?
? so maybe have a indoor and outdoor area?
??
Or If you could build the inside part near Hyde Park you could use Hyde park to run around in?
?
i think we have struck something here :