Features: Math Arithmetic Operation Teaching Toy: The wood speed calculator help kids to learn the math addition & subtraction, between 0-9, assist to build the basic cognition of number relationship and quick resolve problems, with question manual to stimulate kids’ interests, encourage and enhance brain development, exercise and stimulate their hand & eye coordination. Selected Qualification Material: Made of qualified solid hard wood, smooth edges as well as wear-resistance, non toxic original wood color safe friendly to your kids. Arithmetic Wooden Board Toy: The wood arithmetic board toy comes with 2 x boards, 20 x wooden cylinder, multipurpose playing method easily for kids follow and place the right bricks on the board and finish the formula, well stimulate children's desire to explore, the concept of teaching in fun to attract kids’ concentration, practise their logical thinking with early math teaching. Educational Math Toy: Kids need to observe the numbers, find the connection between the numbers and operation sign to get the operation rule, with great educational training for kids, improve their abilities of hand-on ability, cultivate cognitive ability of math, improve problem solving skills and arithmetic enlightenment. for Ideal Choice for Kids or Teachers: Suitable for kids as birthday gift, Christmas gift, and encourage them free to explore their small number world, which also suitable for classroom, activity center teaching props. Specifications: Product Dimension: approx. Board size 22.5 x 7cm/8.85 x 2.75 inch, wooden piece size 3.5cm/1.37 inch Material: Wood Net Weight: approx. 550g/1.21 lbs Package Includes: 1 Set Wood Arithmetic Math Board Toy note: Warning: The toy may contain small accessories and need to pay attention to the swallowed risk. Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.