We did something similar for Enterprise Week, but no way will you be able to do it from Y1 to Y7. Upper KS2 and Yr7 possibly. My classes were offered a max of £50 to make their class a better place and had to pitch to me at the end of the week. They had to convince me or no cash. Yr5/6 got their £50, Yrs 2/3/4 didn't. Excellent resource for this is 'Be The Boss' from Speakeasy, but very expensive. If you are in Cambridgeshire/Peterborough we have an enterprise conference on Feb 5th and there is a presentation on 'Be The Boss'. Contact me for further details. If not, go to Enterprise Village Website for good ideas and to find your local enterprise learning partnership.