String disentanglement puzzle:

This is a brain-teasing puzzle game.
The aim is to take the two pieces apart and put them back together again without damaging any of the components.
In addition to the printed elements, you will need two pieces of string, each approximately 12 cm long.

Assembly:
Thread one string through the smaller hole in the sphere and the two holes in the rectangular piece. 
Finally, thread the end of the string back through the smaller hole in the sphere and secure it with a knot.

T puzzle:
 

The aim is to fit all the T-shaped pieces into the circle formed by the rectangle.

It's a great activity for both children and adults! :)