They are made from boxes with a mouth shape cut out. I used tissue paper and a mixture of glue and water to make them the color I wanted. The rest is just construction paper, paper plates, ribbon, and google eyes.
I leave little surprises in there a couple of times a day. Something simple like a Valentine maze or heart shapes to cut out. (You can find lots of printable Valentine activities at Busy Bee Kids Crafts and KidSparkz.) The kids are always thrilled to find something in their mailbox and sit down to work on it immediately.
I hope you'll check out these 10 other Valentine's Day literacy activities for toddlers and preschoolers too.
The Sunday Showcase
Show and Share Saturday
Link & Learn