This might sound fairly stupid, but I always thought longevity had something to do with price. It's plastic, and will last many, generations. This might also b

This might sound fairly stupid, but I always thought longevity had something to do with price. It's plastic, and will last many, generations. This might also be why they keep coming up with new shapes for blocks. ps.: longevity assumes one doesn't use ones teeth to pry apart blocks.