Key Features :
i : Made to promote simple shape recognition, early tactile hands-on construction and curiosity.ii : Pair with the Sensory Blocks (sold separately),which form a natural extension to this set.iii : Ideal for toddlers as young as 12m+. Constructed from sturdy, durable rubberwood and other safe materials, these blocks are ideal for toddler play environments and will last through years of use.iv : Encourage open-ended learning. Develop your child's social and emotional skills with these open-ended building blocks! Sort, stack or simply gaze through the brightly colored windows.