Adafruit Circuit Playground Classic is an all-in-one board with built-in sensors and LEDs for practicing programming on real hardware. The Circuit Playground Classic is round and has alligator clip-pads so no soldering or sewing is required. The Circuit Playground Classic features an ATmega32u4 processor like the Flora. The board is powered by USB, a "AAA" battery pack, or with a Li-poly battery. 

Circuit Playground Classic has built-in USB support for plug and program support with a Micro-B USB cable. The board features the new 1.6.4+ Arduino IDE, and adding support takes only a few seconds. The Circuit Playground can act as a mouse or keyboard and attach directly to computers with USB HID support.