I remember playing blindfold games a lot as a child: at youth groups, on family events such as new year, and occasionally at school. Which ones do you remember playing, and are there any that your family or children still play?
Keeper of the keys: someone tries to steal "treasure" from the blindfolded keeper, without being heard and pointed at.
Hit the pot: crawl about with a wooden spoon, trying to find something hidden under an upturned bowl, while everyone else says hot or cold.
Four corners: the corners of a room are numbered one to four. Everyone chooses and stands in a corner, and a blindfolded child calls out a number: everyone in that corner is out. This seems to be a popular classroom game.
We used to play "answer questions about your own clothes". This is surprisingly difficult, no matter how carefully you look at yourself before your eyes are covered.
My parents had a cunning one for if they wanted some peace and quiet: who could stay blindfolded and sit quietly the longest? Fifteen minutes was the starting point, with no moving, talking or peeping allowed. It could get quite competitive! We were allowed to use personal stereos, which would give us some idea of time. When you'd decided you'd had enough, you had to leave the room quietly.
In summer, we used to do pretending games of leading somebody about in the garden, touching their arms with leaves, spraying them with a water pistol, and telling them they were in the jungle, or some other exotic place.