on tiles. Repeat for all of the tiles. As long as you move somewhat quickly, you'll have enough time to Mod Podge all of the tiles first, and then lay the pictures down. Once they're all coated, let them dry.
Wooden Magnets with Woodland Silhouettes. Something like this could be nice geoswag. If you have some limbs and a chop saw making the wood slices wouldnt be hard, and you can get craft magnets at the Dollar Store.