Send out "tweet" birthday cards with the Songbird Celebrations Clear Photopolymer Stamps from the Secret Garden Collection by Penny Black. Included in the set are 6 clear stamps on a 5" x 6.5" storage sheet. Images include birdhouses, birds, and the sentiment "happy bird-day." Use the stamps with an acrylic block of your choice and your favorite inks (sold separately). Made in the USA.