Walmart: Santana 61-Key Electronic Piano Keyboard with Microphone - $39.98

Nothing fancy. Definitely nothing high quality, but it's dirt cheap - sold and shipped by walmart. Can be powered by 6 AA batteries or plugged into the wall, so kids can take it outside if they wanted. Picked one up for the niece this Christmas. Built-In Speakers 61 keys with LCD display. 60 fun demo songs. 200 tones. 200 rhythms Dual speaker output Sing-along microphone Record/playback feature Music stand Requires 6AA batteries (not included) or use the included AC adapter