Blocks and Building Kits

Atco Toys - Produces a large variety of building block sets and construction toys. Provides links to sales offices.
DIDA Development - Makes educational electronic toy brick. Taiwan.
Han Nam Corporation - Producing plastic building block toys in Korea since 1990.
Kiblo - 3D building blocks designed for infants and toddlers.
Learning Materials Workshop - Designs building toys using hardwood blocks, acrylic prisms, and flexible forms that develop children's thinking and imagination.
Lego Company - Producer of building blocks.
Ritvik Mega Bloks - Canadian manufacturer of construction block sets for infants and children to age 12.
ThinkWorks - Creates and sells educational block toys such as magnetic or mosaic games. USA.