Unbreakable circle Brain teasers and fun science tricks
Cut a large ring out of card stock. Tie threads onto two tree ornaments. Pull both threads through a small metal ring and knot the ends together inside the paper ring. And now try to free the ornaments without untying the threads.
Step 2: Solution: fold the paper ring in half.
Step 3: Slip the metal ring onto the folded paper ring, pass it along the whole length and remove it.
Step 4: Unfold the paper ring.
Step 5: Now the ornaments can be easily freed from the paper ring. Simple!