Ninja Balls -- DONE. These were awesome! Kids loved them. The marker comes off though with playing. These are also a lot tougher than regular stress balls, so just know that ahead of time that these are both more durable, but less pliable in your hand.
Glitter Jars: for relaxation. Fine glitter, corn syrup, dish soap, plastic water bottles, hot glue gun (to glue top shut). The recipe is included in link. Fun project for the younger girls. We could ask each girl to bring in a bottle.