@Gordon ..... Halloweens fast approaching, as mentioned in Twitch broadcast one of the comps is going to be dress up WZ theme .....
What about WZ themed Pumpkin Competition ... It's something everyone can get their hands on, inexpensive, no fancy apps needed, all age groups know how to carve a pumpkin up and then post a pic of the finished pumpkin.
Rules of comp ... Must be real pumpkin, original creation, no Apps required
Could be fun