The Crown Micro Royal Piano ($65) is a duophonic keyboard instrument that lets you record your own melodies of up to 32 notes and features 7 accompaniments and 14 sounds. However, the most attractive aspect of this miniature grand piano is the microphone and built-in speaker. Aiming the mic toward the speaker under the piano lid gives you feedback that you can tune by proximity. When we amplified this instrument with the Boxer Voice Changer, the results were spectacular!