You could have a dance party while simultaneously making dessert. Just put the powder in the shaker cup, add milk, shake, and in minutes you would have a creamy treat in vanilla, chocolate or banana. Such was the beauty of Royal's Shake-a-Puddin', which also may bring to mind bubbly commercials of girls with flipped hair, miniskirts, and Go-Go boots shaking pudding to the tune of "Shake, Shake, Shake-a-Puddin'. Puddin-Puddin, Shake-a-Puddin' Mmmm- Mmmmm."