A: Absolutely nothing.
However, here's a link to a cool mod for a cheap digital camera that will turn it into a time-lapse MACHINE. No tedious timing needed.
Also, if you have never read Jonathan Swift before, then I strongly suggest you read A Modest Proposal For Preventing the Children of Poor People in Ireland from Being a Burden to Their Parents or Country, and for Making Them Beneficial to the Public (Or just A Modest Proposal for short).
A Modest Proposal - http://www.gutenberg.org/ebooks/1080
Time Lapse Photography - http://www.instructables.com/id/Time-lapse-add-on-to-a-Rollei-digicam/