Had to do gift stuff a day early as they are all out tomorrow.
Problem solved triumphantly

One donkey shaped pinata stuffed with chocs and toys (tiaras for the laydees, elastic band powered aeroplanes for the boys, balloons and some sugar mice).
Tied it to a hook in the ceiling and borrowed a large brolly from the PA.
They took turns in trying to whack it (blindfolded) till it exploded

One computer screen slightly damaged
