Centre Parcs. Lots of things to do for everyone, regardless of age.
But then I am not sure I really get Legoland, or maybe it has just changed massively since we took D when she was about 3 or 4y (she is now 11y). There just wasn't much there, the rides were pretty tame, and there is only so long you can spend looking at lego models!
Legoland has restrictions on height and they WILL NOT let your child on if they are under this - whcih looking at the ages of your children I would say they are not.
CP's with this age group is ideal, ok it is pricier but you are not comparing like for like. Also you can self cater, use the pool for free all day and go for lovely walks whislts little ones are sleeping in their prams
Planning a holiday for family of 4, 2 DS's aged 4 and 21months. Travelling from Ireland by ferry and staying in England for approx a week. Planning on visiting family and friends, then staying in either centre parcs or visiting legoland for a few days. Anyone recommend one other the other?