A bubble is usually formed with a mixture of water and soap. Bubble made its first appearance in Light, Dark, Bubble when it was created by Bob the Ball in the short, Bubble Love or Don't Pop, Bubble. In the short, Bob plays chase with Bubble through a real-world field and worries that it would pop if he plays roughly with it, which it did near the end. Fortunately, for some reason, another Bubble appeared and the game resumes. Bubble would also appear in Bubble, Picture, Mirror; Empty, Full, Pop; Roll, Spin, Pop; and even Bob's own episode and also makes a cameo in Win, Lose, Tie.
Float, and pop, and duplicate.