I’m just dying at how cute this is! Who doesn’t love getting something fun in the mail? Using foam makes the envelopes sturdy enough for my crazy preschooler’s antics. Have you tried to cut foam with your Silhouette yet? The trick is getting foam thin enough. I love using it for kids crafts because it is so flexible and durable. If you hop on over to the Silhouette Blog you can find out how I made the whole playset including the mailbox, foam envelopes, and adhesive stamps. Have fun!