Valentine Wack-A-Pack Assorted Self-Inflating Foil Balloons 4-ct. Packs (Set of 2) 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. Inflated balloons measure 4x3x1". Fun for friends, neighbors, and classroom gift exchanges. Set of 2 - 4-ct. Packs of Wack-A-Pack Self-Inflating Valentine's Balloons. Ages 4+.