| 摘要 |
<p>A jumping game which children play requires a cross shapes layout of square fields (1). Since not all surfaces where the game is played can be marked with chalk or something similar, removable rings are used to mark the fields. Seven square rings (1-7) are made from flat plastic material. The rings are joined together in the required pattern by flexible ribbons (X). When not in use, the rings can be folded up so that a compact parcel with the dimensions of a single ring is obtained.</p> |
