Abstract: A water grenade balloon which, when in the uninflated state, is characterized by: i) a main body having a latex sidewall having thin, outwardly projecting, intersecting longitudinal and latitudinal ribs; and ii), an integral elongate neck terminating in a rolled latex ring defining an inflation aperture. When inflated, the water grenade balloon is characterized by a smooth, uninterrupted, rounded body devoid of ribs and having darkened lines formed thereon defining discrete spaced square boxes wherein the bottom edges and the lower portions of the side edges of each box are relatively thick and prominent and the upper side and top edges are less prominent, thinner and finer, and wherein relatively thin fine darkened lines extend diagonally from each corner of each box toward diagonally adjacent boxes.

Abstract: A sealing device for a balloon comprising a thin deformable strip of foil attached to a flexible balloon retainer line, with the strip being of a thickness that it may be readily wound about the neck of the inflated balloon by one's fingers and when in such position being self sustained in such wound condition, to prevent the escape of air or gas through the balloon neck portion, while at the same time attaching the retainer line to the balloon. The foil strip is coated on one side with pressure-sensitive adhesive, one end of the line laid lengthwise on the adhesive and the strip folded to simultaneously form the sealing device and attach the line. The foil may have a thickness of approximately 0.001 to 0.002 inches.