Just a few thoughts, it might be nice to see the letters outlined in black, I wouldn't mind seeing more Green, bright green, shades of green. Entry #3 - could you drop one of the people lower to resemble a child, change int all to green to see what that looks like?
Entry #4 - could we also try to add a child in this one, add a little more foliage/leaves & go all green, diff shades of green, or another color other than purple.
Entry #5 - I like how "FFC" is tied into the logo, but still needs to be developed a bit.
Entry #7 - looks good with the lmogo on the L, I like the tree roots idea, but not hands.