5 children in the school holidays

[Roxymummyto5]

Hi everyone.

I have 5 children:
10-boy
8-boy
4-boy
2-girl
4 months-boy

Any ideas on keeping children of different ages happy in the school holidays?
X

Big country park type place with a Halloween trail?
Somewhere dry and flat where they can ride bikes (might be difficult I realise to fit them all in the car)
Halloween crafts and movie
Swimming