Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Mega Bloks are a blast

These Mega Bloks are a blast. I collect the military and car ones. These are great for giving yourself something to build and work on. The carrier took me about two days to build (other things to do too). It's about eight hours plus of playing with. There's only one problem with them. They aren't cat-proof. Otherwise they hold up well and are a blast to build. I currently have about 12 military Megablocks. Enjoy!!!