Part of PlanToys PlanMini Collection: cube block measures .7 x .7 x .7 inches. Beautiful shades from black to natural help children learn the concept of color shading. Manufacturered by PlanToys. Recommended for children 3 years and up. Helps develop fine and gross motor skills. Sustainably crafted from chemical free rubberwood trees formaldehyde-free glues organic pigments water based dyes and safety tested Mini construction block set for travel car time. Great to add to other block collections too for additional open ended play opportunities.