Details: • Made to promote simple shape recognition, early tactile hands-on construction and curiosity. • Pair with the Sensory Blocks (sold separately),which form a natural extension to this set. • 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. • 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.