That looks like it's going to be very cool, the bowls look deep.
Why do you get all the good concrete parks down south. With exception of Newcastle which is 2 hours from me and Livi which is 4 hours from me there nowt of any note round here. Yes there's some decent wooden parks but I was brought up riding Southsea and Rom (even though I live up north) so I'm at my happiest on concrete.
I WANT A CONCRETE BOWL!
I've just had a thought, instead of building a half pipe on my land I might dig me a big hole and make a concrete bowl, that'd be cool having my own bowl at the back of the house. Could fill it with water for the kids on hot days - LOL!