1Made of environmentally-friendly ABS plastic, non-toxic and harmless, safe to use, suitable for children to play. 2Equipped with rulers of different shapes to meet the different needs of children when drawing, easy to use. 3Helps stimulate children's imagination, thinking ability, hands-on ability, patience and concentration. 4This ruler toy can allow children to draw different shapes, and improve children's shape recognition ability. 5This drawing ruler set is a good gift for children, suitable for Christmas or birthday, or other holidays.