Wedgits junior builder set is an Oppenheimer gold seal award winner. Kids create unique designs with this 15 piece set. Set has five progressive block sizes that nest, stack, link and "wedge" together. Wedgits support critical thinking skills and develops geometric reasoning as children figure out how to build and align with angles and dimensions. Wedgits junior set is also great for creativity, fine motor and visual skills. Recommended for ages 3 to 103!