Toy-building elements including various combinations of the following
features: a top having a broad surface and at least one projection or
ball-shaped coupler extending above the broad surface; an interior having
contact surfaces that are accessible through an open bottom and are
adapted for effecting a releasable restraining engagement with an
interconnectable projection or ball-shaped coupler on a second
toy-building element; at least one sidewall including at least one groove
for effecting a releasable restraining engagement with a tongue in a
sidewall of another toy-building element; at least one sidewall including
at least one tongue for effecting a releasable restraining engagement
within a groove in a sidewall of still another toy-building element; and
at least one sidewall including an axel-shaped or ball-shaped coupler for
effecting a variably positional engagement with an interconnectable
coupler in yet another toy-building element. These toy-building elements
are combined with others to assemble person-like and vehicle-like toy
figures.