Yamaha PSS-F30 - An organ with accompaniment for children, includes everything your child needs to start playing music. With a wide range of beautiful sounds that only Yamaha could create, an automatic accompaniment function that exposes your child to different music styles, a keyboard specially designed for their smaller hands, and a preset library of famous songs, the PSS-F30 has many fun features built-in to help them learn.
37 mini keys
Polyphony: 32 voices
114 styles
“Smart Chord” function
Includes a free digital Songbook
120 Voices (Instruments)
30 songs
Various functions such as sustain and metronome
Speaker power: 1.4 W
Includes “Auto Power Off” function
Power supply: 4x AA batteries (LR6) or via a 5 V/500 mA USB power adapter (sold separately)
I think it's the friendliest arranger keyboard I've seen. It has realistic sounds, with echo/reverb effects, varied rhythms, you can play both Lambada and Dragostea din tei. The dedicated piano button is very useful, especially when the kids randomly change the sounds. The kids either listen to the demo songs (played one after the other continuously) or learn to play. The batteries last a long time. The sound is mono, even in headphones, like all 3 in the pss series (e30, f30, a50), but it can be converted to stereo by someone skilled in electronics, losing the warranty. It doesn't have MIDI connection (only pss a50 has it via USB), but it can also be added by someone skilled, again losing the warranty. The keyboard has no dynamics (fixed velocity), only pss a50 has dynamics.