This booster kit is the broadest booster kit
and one of the most useful. While it doesn't have any of the 22"
pieces, this kit is a good addition to any kit that suffers
from being too small. It adds multiples of the most basic and
commonly used pieces. In our experience, children are very
fond of the 22 inch pieces, but there isn't too much you can build
with them, and it's better to have lots of the regular blocks.