Create the perfect surprise birthday invitations with the A Secret Stamp set from the Full Bloom Collection by Penny Black. The package includes 3 clear photopolymer stamps on a 3" x 4" storage sheet. The set features images including a little girl ready to share a secret and the expressions "My lips are sealed." and "Shhh...it's a secret." The stamps are designed by Mo Manning and can be used with an acrylic block and inks of your choice (sold separately). Made in the USA.