Great ideas! Keep them coming. Another option I have is to bring it to school (elementary) and can try some stuff there.
i second the lumen printing and photograms
you can just combine the 2 into one .. and make sunprint ( lumen print ) photograms ..
you can also do the same thing but stick the paper in a brownie/box/foldercamera / pinhole camera &C
and you will get an actual image ( that would have made your negative ) on the paper ..
a long term project could be a pinhole box camera left to view out a classroom window
for the remainder of the year ... great-stuff can be done with expired paper
ps i make custom camera kits if you are interested, small or big, it doesn't matter the size .. have fun!