What a great idea for an advent calendar! They've come a long way since I was a kid (I reckon that a modern day advent calendar provides more gifts in the 24 days leading up to the 25^th than I actually got on Christmas Day!).

My son has a Star Wars Lego one, and it's pretty awesome, especially due to the instructions on how to build each day's piece being quite difficult to decipher, meaning I get the honours of overseeing the building to help him get it right!