Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too small and uneven sizes

I was extremely upset when my son dumped these blocks out on Christmas morning. First off, about a third of the box was filled with sheets of styrofoam, was that to make me think I was getting bigger blocks? Why not just make the box the size it needed to be. Second, the blocks were not uniform in size. Such as, some square blocks are smaller than the other square blocks. This makes it extremely difficult to build anything that will actually stand for longer than a few seconds. My 3 1/2 yr old gets very frustrated with these blocks. I will be looking for a replacement set from a different company.