Valentines Day Fun for Kids - 12ea Self Inflating Balloons (One Dozen) Watch them Inflate and Burst from the Package. Smack the Package and Watch the Balloon Inflate. Set of 3 (4ct pks) - Kids will love getting fun self-inflatable balloons on Valentine's Day! Each pack contains 4 individual foil Valentines gifts with to/from lines and a picture of the heart shaped balloon stored inside. The kids can then smack the package and watch as the balloon inside inflates and bursts from the package.