Teenage Mutant Ninja Turtles - Box of 32 Valentines Day Cards Teenage Mutant Ninja Turtles Valentines Day Cards for Kids Toddlers -- 32 Ninja Turtles Valentine Cards (School Classroom Boxed Pack). This boxed Teenage Mutant Ninja Turtles Valentine card set features designs with favorite Ninja Turtles characters. These Valentine cards for girls and boys alike are the perfect handout for Valentines Day parties. 32 Valentines -- enough for most preschool or elementary school classroom settings. Ninja Turtles Valentines Day cards for kids and toddlers measure 4.5" x 2.5". Officially licensed Teenage Mutant Ninja Turtles Valentines Day cards.