The Building Gifts meet two very strongly marked tendencies in the
child. _a._ The tendency to investigate. _b._ The tendency to
transform.
The first and second gifts consist of undivided units, each one of
which stands in relation to a larger whole, or to a class of objects.
The third, fourth, fifth, and sixth gifts are divided units, and their
significance lies in the relationship of the parts to one another, and
to the whole of which they are the parts.
The effect of the Building Gifts is to develop the constructive powers
of the child. Their secondary importance lies in the fact that they
afford striking fundamental perceptions of Form, Size, Number,
Relation, and Position.