content: The kids are happier than a clam at high tide whistling dixie!Pros: Slightly larger than your average domino (thought they may have been tiny).And with 100(!) of em each of the kids have plenty to play with without arguing.Also, they are compatible with just about any other toys, not to mention the workout to their "imagination muscles".Even the resident Teen plays with the young'ens when the box is out.Cons: Can't think of any. Just don't let your dog think it's a box of new chew toys.Oh and I just noticed they're by Melissa & Doug. No wonder.All kids should have a block set in their house!