How to use: First, take out the numbered stacking blocks from the alligator's base. Start stacking the blocks on the alligator to 'feed' it. Try different combinations of numbers. Once you've stacked the blocks, slide the alligator's head down slowly. It will stop on the top block, and you'll see the sum of the numbers in the side slot. To learn subtraction, simply remove some blocks and see how the sum changes. Note: Keep the toy away from small children who might choke on the blocks. Also, make sure to store the blocks in the alligator's base after use to avoid losing them. Maintenance: Wipe the toy and blocks with a clean, damp cloth if they get dirty. Avoid using harsh chemicals that could damage the toy's colours and materials.