Simplify organization in your preschool classroom with Sprogs' 20-Tray Wooden Storage Unit. The spacious cubbies are perfect for organizing toys, books and puzzles or sorting student projects. Baltic birch construction, rounded edges and a UV finish make this unit a durable and safe choice for classrooms. Choose an assembled or unassembled storage unit with or without plastic trays. Add casters for an additional charge to make your storage unit mobile.