My 10 y.o. daughter rides a Liquid Force Star 118, this will be her 3rd year on that board.
Perfect size for her, but she's not very heavy. A 124 size might be best for your older rider, and should work fine for all ages that you mentioned.
Liquid Force Nemesis is the same board in a boy version.
Do a search and you should find some good deals on 2011 or 2012 leftover boards with boots.