Kids will be delighted to learn about nature with these substantial, solid wood Loose Parts Organic Wooden Trays! Each curved tray is divided into compartments of various sizes, encouraging children to engage in simple classification and seriation. As children are introduced to new objects, they will develop spatial relationships and strengthen their fine motor skills. These durable trays also serve as beautiful storage for loose parts between activities. Largest tray measures 38cm L x 38cm W x 3cm H (14-3/4" L x 14-3/4" W x 1-1/4" H).