Zerowin Wooden Montessori Toys Number Cards and Counting Rods Teaching Aids Math Sticks with Iron Box, Small 4.9inches Let the baby know red yellow, green, blue four color and mathematical operation Package includes 27pcs math signs/numbers 0 to 9/letters and 52pcs colorful counting rods Wooden "calculator" helps teach math skills and color recognition Great educational value Kids must play under adult's accompany, for preventing kids chock from small pieces Rods can help kids understand math better,Wooden Number Cards and Counting Rods Arithmetic Sets with Box for Baby Kids Early Education