2 years and up. Enhance activities incorporating found loose parts with this matte set of 4 Loose Parts Sorting Trays. Made from a new UV-resistant composite material, these trays are the perfect addition to nature-based activities indoors or outdoors. Each tray is divided into 6 compartments, encouraging simple classification and seriation while children develop spatial relationships and strengthen their fine motor skills. Each tray measures 15" Diameter x 1.6"H. Contents not included.