Random Acts of Kindness for Kids
Fun Mail for Kids -- send boxes of candy through the mail. If they're under 13 oz. you can slap a stamp on them and put them in the mailbox! How fun would it be to see this in your mailbox?
Blessing bags (keep in car to give to homeless). Maybe food gift cards, a list of resources in the area, baby wipes, snacks, toiletries...
Making braclets for women in need and maybe a card from the kids. It might be nice to make salvation bracelets with beautiful beads instead of the plastic ones used for kids.