This style of video is just really clever - and likely to attract a good number of viewers... (any it gets you to keep watching as you want to see what comes next). It could be interesting to explore adding in a campaigning twist to this sort of collaborative art work (although you would need some great artists and a lot of time to make this work....)
Way to use this movie?
Show it to children, set up a large piece of blank paper on a wall, identify a theme (e.g. Spring), provide black vivids, make this available for children to access at anytime and let them create!