Its a drinking game really but can be adapted for more sober occasions
One person is designated to be the bunny. puts both hands up by ears to make rabbit ears sticking up. Looks round group and points his ears at another person; that person has to 'catch' the bunny by putting their hands up by own ears.
When they've got the hang of that, you can introduce next level. The child to the left of the person with the bunny puts up his/her left hand, the person to the right puts upn his/her right hand. As the bunny is passed, the extra ears are passed as well, to the people immediately next to the receiver.
Fyck it that makes no sense. I'll google it for ya.