Features:Enjoy DIY fun:You can use the dry eraser to label the decider spinner with numbers and then teach children numbers counting addition and subtraction very suitable as the math teaching tool in the classroom or home bringing you a wonderful time.Easy to store:These spinner wheels have small size portable for you to carry when you travel go to picnic camping or other outdoor activities and convenient for you to store them in a drawer cabinet plastic bag backpack and more would not take up too much space.Specifications:Material: plasticColor: as the picture shownSizes:Spinner board: approx. 15 x 15 x 0. 12 cm/ 6 x 6 x 0.04 inchArrow: approx. 10 x 0.6 cm/ 4 x 0.2 inchPackage includes:10 Sets of game board spinnersNotes:Manual measurement please allow slight errors on size.The color may exist slight difference due to different screen displays.Pointed items please keep away from children.Suitable for people over 12 years old.