Nickelodeon Dora the Explorer 32 Valentine Cards Dora the Explorer Valentines Day Cards for Kids Toddlers -- 32 Dora the Explorer Valentine Cards (School Classroom Boxed Pack). This boxed Dora the Explorer Valentine card set features 8 designs with favorite Dora the Explorer 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. Dora the Explorer Valentines Day cards for kids and toddlers measure 4.5" x 2.5". Officially licensed Dora the Explorer Valentines Day cards.