主权项 |
1. A mat comprising:
at least two pairs of opposing sides forming a perimeter for a polygonal object, each side having a tooth part comprising a succession of teeth, and at least two curved cutting lines dividing the mat into four blocks in such a way that each of the four blocks has a curved assembling part for engagement with an adjacent one of the four blocks, wherein each of the four blocks of the mat is configured to engage with an adjacent mat via the tooth part to form a puzzle mat set. |