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