Class auction idea- Vintage reclaimed wood sign - I imagine the art teacher painting the flower and all the children's names being written in as part of the fine black lines (can't see it unless you look real close.
Chou Chou Bartneck-Tsukerman Reclaimed Wood Trim with String Art Cross Wall-Sold out on the site, but seems like a pretty easy craft to make at home or with your church group. I really am looking forward to making this.
SMASH Books: The Un-scrapbook. A walk through of how to complete a Smash book as you go through your vacation. Thoughts are fresh. By the end of the trip you could print your pictures and add them yo places you already designated.