I like the sound of the activities!
These two are also lovely and don't think booking opens for a few weeks at least:
http://www.crockfordbridgefarm.co.uk/Ev ... ret-forest
. - you get taken through the woods on a story adventure acted out by different characters (adding your Christmas wish to a tree) and end up at Santa's grotto
https://www.painshill.co.uk/educational ... adventure/
. - a bit of a walk in lovely countryside and then you visit the big man in an amazing (natural) crystal grotto
Have been to both of these in previous years with my young kids and both were magical.