Other topology puzzles

Wheels of Happiness

1.   Removing the ring from the rope  (work on the rope/strings)  

2.    Separating the nails

3.  Space puzzles - note the escape aides, the weakness of the puzzle

4.  Separating two intertwined keysf   the solution is outside the main key but on the key top not the  

      key itself.  (Lateral thinking)