The teaching stamp set is as fun as toys, makes learning fun and exciting, and increases children's interest in learning! suitable for students to practice, parent guidance, and teacher teaching Save Time: Easy to operate, the math questions can appear in front of you by scrolling the stamp, which can be adjusted, and the questions can be changed by gently twisting the button, and the questions will be randomly selected. Good Quality: photosensitive process, clear stamping, Printing thousands of impressions without losing the original quality, Strong ABS plastic components and housing. photosensitive process, clear stamping, Print thousands of impressions without losing the original quality, Strong ABS plastic components and housing The addition and subtraction math stamp is a fun and meaningful gift for children! Make learning fun and exciting. Suitable for student practice, parent guidance, and teacher teaching