We're toying with the idea of going to Northumbria, possibly next Easter, with DC who will then be 3 and 1. DP is concerned there won't be enough to do if the weather is a bit off, although DC1 loves castles and I'm assured there are enough in the area to keep them occupied!
So...does anyone have any ideas for things to do in the area with these ages, or know if there is enough stuff to do with such young children?