One of the staples of the Hallmark Company is its line of party supplies, including napkins, table coverings, paper plates, and invitations.
In 1979, Hallmark produced Miss Piggy invitations, sold in sets of 8. The invitation showed her lounging on cushions, attended by frogs. The front said "Awaiting the pleasure of your company". Inside the cards there was a space to fill in the event details, and the line "Do hope you can make it." The cards measured 3 inches by 5 inches.
In 1981, Hallmark created Kermit party puzzlers. Each clear plastic puzzle contained several small balls and holes; the goal is to get all the balls into the holes at the same time. These were sold in packages of 4 to be distributed as party favors.
Hallmark issued a complete set of Valentine's Day party supplies in 1981. The illustrations featured the main Muppet Show cast -- Kermit the Frog, Miss Piggy, Gonzo, Fozzie Bear and Scooter -- along with several seldom-seen creatures, including Luncheon Counter Monster, Snowths, Koozebanians and Fazoobs.