This has been a great purchase! My son didn't have any blocks yet so we stared out with these. He's been enjoying building with them & knocking them down. Since they are cardboard I don't have to worry too much about holes in my walls when he's using his Superman strength the knock the building down.
Blocks were for grandchildren and were an instant hit. One of the few toys they use consistently. Only critique is that there are too few of the larger red and blue blocks. This set was actually purchased to supplement a 40 piece set purchased at Christmas, since the red and blue cannot be purchased separately. We put the bigger blocks together and left the yellow ones languishing in the box doomed to be forever flat.
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