Fifty-four keys give both hands somewhere to go, which matters once a child moves past picking out single notes. The keys are smooth-edged and evenly set, and behind them sit 6 demo songs, 10 timbres covering piano, guitar and violin among others, an LED digital display and a learning function that walks a beginner through a tune. Safe PC plastic makes up the shell, non-toxic and free of odor, in a plain black finish that suits a bedroom desk or a living room shelf. The keyboard runs on 4 watts at DC 9 volts and measures 25 by 7 by 2.5 inches, slim enough to slide behind a sofa or into a cupboard between sessions, and it weighs about 2 pounds.