I have already spend more than $200 on lego for my 3 year old over the last few months. I have purchased some sets of lego classic & city ones. He loves to build things with small pieces, and we read instruction & build them together. DH told me that he sold all his legos (of course not the classic, city ones) for almost a thousand right before he went off college. I wish he had kept all those legos for our sons to play since some of them he sold were the rare & out of prints ones.
Now the lego advent calendar is coming out, and I am tempted to buy as well. Lego seems like a money burning toy. How much is reasonable to spend for lego in a year for a young kid?