There are three buttons on the front that include: one for classical music and lullabies, one for nature sounds, and a mode selection button that will allow parents to choose between music only, projection only, or music and projection. A slide switch on the side of the unit acts as an off, low, or high switch. There are three cards that allow for a variety in projected images.The first card for the youngest of babies projects three high contrast images of the Discover n' Grow characters. As baby grows and their eyesight develops, card number two projects three different coloured butterfly images that will give the illusion they are moving, a projected mobile. For the growing child card number three will be most interesting with the most detailed full colour projected image. Plays up to 15 minutes of music.