Magical mix of colors can be stacked now with the Stacking Rainbow Pyramid Blocks Set by Guidecraft. This manipulative activity toy for the youngest kids includes 6 wooden stacking blocks with colored plexi insets which allow this building blocks set turn into rainbow of colors and their combinations. The Stacking Rainbow Pyramid Blocks Set is a great multiple activity toy for stacking, sorting, building, sequencing and creating imaginative, colorful constructions! This toddler activity toy from Educational Toys Planet features hardwood frames, rounded corners and edges, and inset acrylic plexiglass. Largest square measures 7 x 7 x 2 inches.