- Ritvik Mega Bloks - Canadian manufacturer of construction block sets for infants and children to age 12.
- Han Nam Corporation - Producing plastic building block toys in Korea since 1990.
- 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.
- Atco Toys - Produces a large variety of building block sets and construction toys. Provides links to sales offices.
- Kiblo - 3D building blocks designed for infants and toddlers.
- AfiX System - Construction blocks with three dimensional joints. Includes product outline, parts catalogue, and pictures of possible configurations.
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