At those 'moments' give a sheet of newspaper out to every pupil. Suggest an animal, mathmatical shape, or household object. Pupils are allowed one minute to tear out the shape. No drawing allowed. Collect the efforts and display.
Pupils judge and give reasons for their choice.
Winner gets a standing ovation. Each pupil chooses a destination around the school. They write detailed instructions on how to reach the destination but don't name the destination. Swap with neighbour. Each follows instructions and attempts to arrive at destination.