Blocks and Building Kits

Atco Toys - Produces a large variety of building block sets and construction toys. Provides links to sales offices.
www.atcotoys.com/

DIDA Development - Makes educational electronic toy brick. Taiwan.
www.dida.ttnet.net

Han Nam Corporation - Producing plastic building block toys in Korea since 1990.
hannamcorp.en.ecplaza.net/

Kiblo - 3D building blocks designed for infants and toddlers.
www.kiblo.com/

Learning Materials Workshop - Designs building toys using hardwood blocks, acrylic prisms, and flexible forms that develop children's thinking and imagination.
www.learningmaterialswork.com/

Lego Company - Producer of building blocks.
www.lego.com/

Ritvik Mega Bloks - Canadian manufacturer of construction block sets for infants and children to age 12.
www.megabloks.com/

ThinkWorks - Creates and sells educational block toys such as magnetic or mosaic games. USA.
www.thinkandthrive.com