Awesome lego pic, cake, and be-headed cake lego man.
I guess he would be too young for the Sets, but my last favorite ones where the Mecha sets that came out. Before my youngest brother "grew" out of legos he managed to buy many of the sets and I can say they are pretty cool.
And Bionicles are always cool. I have the 1st original set, and a few others as they came out. I still dig the White and Black ones they come out with, they always look the coolest to me.