TRIOS are hands down, one of A&W's favorite building toys. They LOVE these and so do I! TRIOS were actually one of my very first reviews! In any case, I have about 5 seconds but Amazon has the Kings Castle set which is usually priced at $74.99 priced at just $38!! This is a steal that you don't want to miss! I am going to pick one up for A&W for Christmas. Happy Shopping!