Six trays of project blocks with each tray measuring 39cmL x 29W x 4cmH. Each tray has a handgrip hole on each side for safe and easy movement between rooms. Build cityscapes, bridges, towers or create without any structure at all! Made of beautifully finished, well-sanded beech timber in a huge variety of shapes including arches and columns. Children will develop fine motor, problem solving and verbal skills while learning math and architectural concepts. The 158 pieces fit neatly into the 6 trays for storage.