Might be of interest to schools looking for an outdoors project for children to get involved in - the Marine Conservation Society have recently launched their Source to Sea Litter Quest!
It asks children (under supervision) to head out on a litter pick near their school, in school grounds, in a park etc, and use a bingo-style card to spot (and pick up) common beach litter items. Let MCS know the school have completed the Quest and they'll get a certificate 
Curriculum links in geography, citizenship, science, and just gets children out and about! More info here www.mcsuk.org/media/gbbc-sourcetosea-education-resource.pdf