ADAFRUIT INDUSTRIES ADAFRUIT Circuit Playground Classic MCU Development Board 3000

Circuit Playground Classic

Circuit playground classic is the best way to practice programming on hardware with no soldering or sewing required. The classic version contains ATmega32u4 and is designed to work with Arduino IDE and code.org CS Discoveries only. It also comes with Firmata already programmed in so you can use it with code.org Discoveries without any preparation or updates.
Circuit Playground has built-in USB support so you can plug it in and it just shows up. All you need is a Micro-B data/sync USB cable (not included).

Features and Benefits

10 x mini NeoPixels, each one can display any color
1 x Motion sensor (LIS3DH triple-axis accelerometer with tap detection, free-fall detection)
1 x Temperature sensor (thermistor)
1 x Light sensor (phototransistor)
1 x Sound sensor (MEMS microphone)
1 x Mini speaker (magnetic buzzer)
2 x Push buttons, left and right
1 x Slide switch
8 x alligator-clip friendly input/output pins
Includes I2C, UART, and 4 pins that can do analog inputs/PWM output
All 8 pads can act as capacitive touch inputs
Green "ON" LED so you know its powered
Red "#13" LED for basic blinking
Reset button

Adafruit Circuit Playground

Atmel ATmega32U4 Datasheet

Circuit Playground User Guide