This little board is only sized 55mm x 65 mm and has an 8 bit RISC processor, 20 digital IO ports, 6 Analog ports and 32 kB of flash memory. This might sound small to those developing complex graphics software but are sufficient to learn programming, develop all kinds of home projects for robotics, 3D printing, Domotica etc. And the development increases dramatically fast, catching up with the newest processors (32 bits RISC is already available for about 35 US$). At the same time through crowdfunding new boards are designed by brilliant youngsters with great ideas. Nowadays a complete microcontroller capable of running at 90 mHz, 250kB of flash memory capable of controlling all the house appliances costs about 30us$ and has the size of 15 mm x 30 mm.