- Mega Bloks
 - Canadian manufacturer of construction block sets for infants and children to age 12. - K'NEX Industries
- Official site for the makers of the colour-coded building sets that include machines and robots.
- Atollo
- Construction toy system that builds flexible models, from figures to space structures.
- Toymaker's Workshop, The
- Master toymaker and teacher Rick Hartman presents videos, hands-on workshops, invention assemblies, festivals, and kits for kids, parents, and teachers.
- ZomeTool
- Manufactures ball-and-stick kits for making 3-dimensional structures such as molecular models or geodesic space-frame structures. Also offers lesson plans for teachers.
- Polymorf
- Construction set system that uses just seven different geometric shaped plastic panels to build a variety of shapes, models, figures, and more.
- Kapla
- Construction game that enhances social skills and creativity.
- Rokenbok Toy Company
- Official site of the expandable building system that includes radio controlled vehicles, designed for children ages six and up.
- CoasterDynamix
- Designs and produces a rollercoaster model that is modifiable, visually accurate, easy and quick to assemble, expandable, and just plain fun!
- ImagAbility
- Designs and sells manipulatives building blocks construction sets and toys.
- HandsOnToys
- Makers of Toobers & Zots, Wiggly Giggly, and Flashball.
- Sploids
- Makers of Lego to K'NeX interconnector blocks.
- Bridge Street Girder and Panel Building Sets
- Construction toys for girls and boys from Bridge Street Toys. Ideal for science fair projects.
- Robotix
- Includes information on products, activities, and more.
- Ikoso Kits
- Make permanent, 3D geometric shapes many of which are glow in the dark.
- Astro-logix
- Construction kit based on three-dimensional geometry.
- Space Clusters
- Maker of geometrical kits for building three dimensional constructions, sculptures, mobiles and mathematical models.
- Bulls-Eye Inc.
- Featuring unique wooden toy puzzle blocks and soft foam puzzle blocks.
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