Hi ya I'm from Ely and I've not really found much that goes on in the holidays here,
The only good park in Ely really is the big one near the hospital, that's really good.
I went to Church Farm in Stow badolph, it?s quite nice they have tractors for all ages and a few animals, although my little girl just loved the trampolines they have!
Other than that the Maize maze is a really nice day out, Weather permitting, I really enjoyed it too.
Don't know if anyone has been to Cheeky monkeys play barn in fulborn, or the funky fun house in Cambridge, they are really good for the kids, although the fun house is all indoor and it's about £5-6 per child.
They both have websites to look at...
www.www.funkyfunhouse.com
cheeky monkeys: www.cheekymonkeysltd.co.uk
Also the mepal outdoor centre, not cheap but worth it, address...
www.mepal.co.uk
Hope this helps someone out as I know how annoying it is finding things to do!!
Good luck Kelly.