Specifications: Made of premium material durable and odorless. Use the elastic band to form your geometry on the nail plate. The geometric area will be calculated by the number of squares. Great for children kids primary mathematics education. Type: Nail Board Material: Plastic Features: Double-Sided Intelligent Toy with Elastic Bands Teaching Aids Size: 16cm x 16cm/6.30 x 6.30 (Approx.) Notes: Due to the light and screen setting difference the item s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Nail Board 10 x Rubber Bands