Fun places for toddlers/young children in Windsor/London area

[user365683]

We are hoping to visit family in July/August from Liverpool. We already have planned Paultons parks and a possibly a day into London to Sea life and the Science museum.
We have already been to Windsor Legoland.
Happy to travel up to an hour.
Any recommendations appreciated

They may prefer the Natural History museum yo the science museum, but they are next to each other so easy to do both. The London Dungeons. The Cutty Dark? A boat trip on the Thames? The gondola ride across the Thames at Greenwich? Mine enjoyed the Greenwich observatory as well. Boats in Regents Park. Lots of things, depending on what they enjoy/ages.