The Circuit Playground Express Base Kit provides everything you need to get started with the powerful Circuit Playground Express microcontroller board. This kit offers a solid foundation for learning electronics and programming using various platforms such as Microsoft MakeCode, CircuitPython, code.org CS Discoveries, or the Arduino IDE.Kit Includes: Circuit Playground Express board USB cable - A/MicroB - 3ft 3 x Alkaline AAA batteries 3 x AAA Battery Holder with On/Off Switch, JST, and Belt Clip Mini Storage Box About Circuit Playground Express:This versatile microcontroller board features an ATSAMD21 ARM Cortex M0 processor running at 3.3V and 48MHz, packed with sensors and capabilities for interactive projects. 10 x mini NeoPixels (full color LEDs) Motion sensor (LIS3DH triple-axis accelerometer) Temperature sensor (thermistor) Light sensor (phototransistor with color and pulse sensing) Sound sensor (MEMS microphone) Mini speaker with class D amplifier 2 x Push buttons (A and B) Slide switch Infrared receiver and transmitter for remote control and proximity sensing 8 alligator-clip friendly I/O pins (analog, PWM, capacitive touch) MicroUSB port for programming/debugging and USB HID device support 2 MB SPI Flash storage optimized for CircuitPython The Circuit Playground Express is ideal for beginners and experts alike, supporting block-based coding, Python, and Arduino code to suit your learning or project needs.