Legos have become a big part of everyday life in our household.  Mr. Z got a big set for Christmas this year, and it's been fun to watch him integrate it into his play with the other sets he has.  Ninjas, Stormtroopers and Lego movie cops all play and fight together.  Legos cover the floor in his room and on his lego table.  I guess it's all part of the fun of being 5!