Buy Subtraction Snake Game The purpose of this material is to introduce the child to the unit combinations of subtraction. The material consists of one box with 5 sets of negative bead stairs, one box with 5 sets of colored bead stairs, one box with 1 set of black and white bead stairs, one box with 23 golden ten bars. The 4 boxes fit neatly into the beechwood working tray. • Recommended Ages: 5 years and up Buy now: https://kidadvance.com/subtraction-snake-game.html