Actually its for his 2nd birthday in early January but Christmas is likely to get the right people looking 
DS2 has been known to throw a strop at DS1's preschool picking up time when I have to extricate him from the imaginext lions den thingy he's playing with while i get ds1's bag etc together.
It says age 3 upwards on the box, as do all the fort/castle things on the market. Is there a good one for a younger toddler, maybe that doesn't have too much building or pre-play fiddling to do? But has some nice easy to use features. That might do well a year from now too?
Asking for the moon or does one exist?