Preschoolers can learn addition and subtraction while having a great time with this counting STEAM wall accessory board. This interactive board features wooden fingers that can be raised and lowered with a distinctive clicking noise to help little ones keep track of their progress. Brightly colored to capture and hold student's attention, this activity board also features kid-friendly, smoothly rounded corners for safe play. This Monetssori style busy board installs almost effortlessly on our train STEAM wall system, 3 panel wall system, or freestanding art easel but can be used on the floor or at an activity table as well. The tactile, visual, and audio output is great for sensory play and keeps kids entertained while teaching valuable life skills. Regularly wipe clean with a damp cloth and dry for long-lasting use.