Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Stack it up!

My 16 month old son received these blocks as a Christmas gift. He is just at the age where he is getting into stacking the blocks. I can see the wheels turning as he chooses from the variety of shapes to stack. I am also very pleased with the quality of these blocks. The edges are slightly rounded so that they won't scratch the baby soft skin. And, an extra bonus is the wood box that they come in. Part of the fun with these blocks is putting them away and fitting each one in like a puzzle piece! I know that we will get many years out of these blocks and I look forward to watching my son's creativity!