Inside entertainment within 20 mile radius of Chelmsford, Essex

[NottsMum]

I'm going to stay with family for a few days but as the weather's supposed to be cold, wet and snowing we want to find something fun to do which won't involve us freezing. The kids are 3, 7 and 9. We'll be in Chelmsford, Essex.

Suggestions please!

have a look at this
Let me have a think and I will get back to you with some more ideas

Thanks MM. This looks great but need to check with sis whether she'd go that far.

Any other suggestion are very welcome!

Colchester zoo has or did have a big indoor play area.