Blocks? Sure, these can be blocks.

In fact, Nick seemed to think that these blocks were way more fun than the regular kind, since they stack up so high. Shopping at Costco means I have lots of stackable boxes, especially Kleenex, since all of us are suffering from nasty colds.

As I was putting away a considerable number of boxes, Nick passed the time by creating his own towers. He looks rather pleased with himself, I think.