See also: Lego
Link-Kit
omagles.com
Also known as Omagles, a building toy to create an unlimited variety of child-size toys for climbing, riding or pretending.
Atollo
atollo.com
Flexible models, from articulated figures to geometric space structures.
Astro-logix
astro-logix.com
Create complex and beautiful fractal stars and 3D geometric shapes.
Gridblox
aptitude-testing.com
Cubical wooden blocks with notched corners that interlock by gravity.
The Construction Site
constructiontoys.com
A large variety of construction toys including brand names such as t.c. timber, K'nex, Lincoln Logs, Tinkertoy and Exin Castles.
Wedgits
wedgits.com
Wedge shaped building blocks construction set. Includes design ideas and worldwide list of dealers.
Kapla USA
kaplaworld.com
Wooden construction blocks from France, with a long thin shape, and books with suggested projects. Provides photo gallery of museum exhibits, and workshop information.