The Base B Kit has a full range of pieces,
including the 22 inch rectangles. It is "chunkier" than the Base Kit A
and has more big pieces and fewer small ones. It has enough pieces to
build a substantial building and includes some road planks. At about
4-1/2 children are starting to be able to translate a picture of
something into a block replica (though they are imaginative enough to
create their own structures), as soon as they master the idea of a box
on top of another box by planking over the first box with roof planks.
They may also start out by laying out flat constructions such as
airplanes with wings or stick figures before starting to build
vertically. As time proceeds, children will now begin to integrate more
fanciful stories and will employ dolls and toy soldiers. Blocks this
size also work well with small cars, and parents may wish to buy road
intersections and additional road planks from open stock.