If you're just getting into synths, want something super-portable, or know a younger synth-lover, check out the Teenage Engineering Pocket Operator PO-16 Factory. This calculator-sized digital synth was designed specifically for its portability and intuitive interface, sporting a screen with fun animations, a 16-step arpeggiator as well as a 16-step sequencer, 16 onboard effects, and three synth engines, along with a few other features. The Operator Factory is perfect for on-the-go composition or for people who just like playing with synths.