Out of 150 pieces, 7 were - 1x4 and 2 - 1x3, all other pieces were 1x2 and 1x1, there were a few pieces that weren't square but they still only had 1 or 2 bars on the tip for construction. He didn't have any of the 2x2 parts. I was looking for larger items to add to my current collection. My two year old loves tunneling for his puppy squad cars. This set didn't work. I returned it and bought 80 more packs from Target. Set 80 had 12-1x4 and 4-1x3 and 1 2x2. That's a great block. Note, however, that this pack is mostly small pieces.
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