Its great of you to be doing this, and I whole throw my hat ion, I currently run a Weekly contest the Wednesday Wal, where I ask people to get out get some exercise walking and share a few photos of what they see on the walk, I give out a few SBI Shares to a randomly drawn set of participants and would love sponsorship to be able to award more people who join.
And while at it there is another contest that we do in collaboration is a challenge hosted by @elizacheng called the Make me Smile Challenge, that's one that she may want some support for ther eis so much anger inthe world these days anything to make people smile is a good thing I think
I already love #WednesdayWalk, will also look into another one you suggested.
Thanks so much truly appreciated :)