Four Hummingbird Duo controllers Power supply, USB cable, terminal tool, snap-in stand-offs for each controller Three each of red, orange, yellow, and green single-color LEDs Eight tri-color LEDs Ten hobby servos and six servo extension cables Four gear motors with wheels and plastic block adapters Four vibration motors Four each of light and temperature sensors Two each of distance, sound, and rotary sensors Packaged in reusable plastic tray organizer Program in everything from Scratch to Java!