This is a very old favourite, thought to date back to Tudor times at least! It was originally known as Blind Man's Buff. There is also a traditional Chinese version known as "Blind Man" or "Chicken".
You will need:
All you will need is a blindfold and enough space for some excitable children!
How to play:
Choose one child to be "it", and blindfold him or her. Turn her round a few times to disorientate her a little, while the other children group themselves around her. Then let her try to tag one of the other children, who will then become "it".
Play as above, but when a child is caught the blindfolded child must try to guess who it is by carefully feeling their face and hair.