MathLink Cubes Numberblocks 21-30 This is a new set of Numberblocks 21-30. Since it is not yet released in Japan, this is the overseas version. Although unopened, the box may be scratched during transportation. Please refrain from purchasing if you are concerned. [Product Overview] MathLink Cubes from "Numberblocks," a children's channel operated by the BBC in the UK. For young children, it's great for learning the basics of numbers, such as counting, comparing sizes, and creating patterns. For elementary school students, it can be used for basic calculations like addition and subtraction, as well as multiplication, area, and volume, making it a math block that can be used widely and for a long time, according to age and grade level. - Number of pieces: 327 pieces - Contents: Activity cards, 3 character accessories - Theme: Number learning Type... Numbers This is an educational toy that allows you to learn math in a fun way using cubes and activity cards. - Brand: Numberblocks - Product name: MathLink Cubes Activity Set - Target age: 3 years old and up - Contents: Cubes, activity cards, accessories Thank you for viewing.