Learning Lights Letterbug switch adapted toy teaches colors, letters and language skills. The lights on Letterbug’s back spin as she cheerfully talks and sings about four colors (red, yellow, green and blue). She pretends to be different things, like a red fire engine when the colors change. The ABC button triggers an upbeat letter song that teaches letter names and sounds. Press Letterbugs antenna to trigger flashing lights and audio. Press the ABC button on the side to hear a song that teaches letters and sounds. Letterbug can also be rolled to activate the changing colors, music, sounds and phrases.