Each group gets people/items/themes randomly picked out and they have to create a sketch.
We tied ours in with junk modelling night so they could make props then act out the sketch for parents at the end of the night
See attached for ideas but you can think of other ideas :)
Split into teams (4-6)
Each team randomly picks 2 people, 2 objects and a theme.
They then decide on a story to act out and build props/objects with the junk (Paper, cartons, tubes, tins etc)
Act out their story the rest of the pack