Day out near Hemel/London with 10yo and 1yo!

[Habdab]

Hi
We were planning to go to either legoland or chessington tomorrow but forecast is awful! Would like to go somewhere fun and exciting - DS (23m) hates his buggy so will need freedom. Any suggestions?? Thanks.

legoland is brill. but for a 23m old who hates his buggy i dont think it will be a very gd day out for you, v busy and crowded. try sealife or something,will be less crowded and no so much space for him to get lost in.
have a lovely day wherever you go

Warner bros Harry potter thing at Leavesden near Watford?

Thread on here said it was fab.

Butterfly world ? Heard that's really good too.

Natural history museum at tring?

Thanks everyone. We ended up going to Twin Lakes in Melton Mowbray - completely the other way! Great day though - thanks for your suggestions, I will try them one day!