Look at "Hobbies", the last sub-section (where the chess is). It looks like a Gypsy Ball. You have to place it with the "triangles" pointing to the wall, 1 or two rectangles from the wall, or in an open space. Take care to leave enough space around, for the playing sims.
One sim call, and the others play - the calling sim can play alone too. Each player gets a cube. The caller picks a ball from the myshuno, and the players search for the number he called - like Bingo.
After a while, there is a winner.
The Myshuno fun rate is 10.
thanks for that
after 18 months i finally know exactly what it does