Learning addition and subtraction is easy and fun with the Math Keyboard - Addition, Subtraction by Small World Toys! This unique math keyboard allows children to simply press a key with a subtraction or addition problem on it and the right answer will appear. Half of this portable math toy is covered in pink keys - these have subtraction facts and answers and the other half of the board is covered in white keys with addition facts and answers. Children can take the Math Keyboard - Addition, Subtraction on the go for math fun. This educational math toy doesn't require batteries - so children can spend time building math skills without needing to replace the batteries. This mathematics plaything also has no loose parts so it won't be broken and no parts will be lost. This math keyboard is great for learning math facts quickly and efficiently. Math Keyboard -Addition, Subtraction will provide great math fun for children of all ages!