A ribnet query / question I can help with at last!!!
Yes I would donate using your money box but maybe a sign telling the person donating to put money in and see what happens would attract more attention. Also put a command into your PIC chip that at random sets the motions off thus attracting attention.
Also think about the amount of space which a business would have to give up to display your money box etc.
Looks well made though compared to the others in the photos! Discuss in your evaluation materials that would give it a longer life etc.
Used to teach Systems and Control