When I purchase a toy I ask myself is this worthwhile or does it have limited play value? I guessed right on this one. - Michael T. Gallagher "ABBA person" I approved this for my daughter's 4th birthday, she loves it! She's had as much fun building the robots they have instructions for as she's had building her own only one of its kind sculptures. Pieces are actually well-built and there's a good combination of types of pieces to make different equipment. My daughter did have a modest trouble at first putting the pieces collectively since if you're not holding a peg straight-ish it won't go into the hole, but I only had to show her once what the trouble was and she was able to promptly get used to the right orientation. My only conundrum was that the white "mouth" piece had no mouth on it (like it does in the cinema), but I had some face part stickers left over from easter eggs that worked just fine. To be honest, that on...