raised salt painting: create design with glue, cover glue with table salt. Touch watercolor brush on salt, without smearing and watch color be absorbed by salt. Let dry. This looks fantastic. So, inverted rock salt painting.
DIY Tiny Sumo Bowling Pins for Kids, made from recycled plastic bottles - ewe on the sumo; but a nice cheap way to make a bowling set for toddlers. For whatever reason bowling sets are always a favorite.
For Children's Church? The "Secret Service" Activity: A Lesson in Kindness (*My note: Going to modify this to fit the needs of some of the kids in my Children's Church class considering there's some friction between some of the kids.