I found this DIY from Kinsey over at Sincerely Kinsey!
She's always posting lots of great DIY's!
supplies: moss mat, cork coasters, scissors, and glue. I found the moss mat and coasters at Hobby Lobby. I also used a small paintbrush to apply a thin coat of glue to the entire coaster, but I don't believe it's absolutely necessary for the project.
So simple and fun for spring!