drag an icon to a polo (one of the gray characters) to make it play that icons sound and looks click the "loop" button on the top right corner to reset every character the black and leaf green icon do not make sound but you can still select them to see what they look like the best in my opinion are beat 4 effect 3 melody 4 and voice 1
this would not be possible if the mit media lab did not make scratch.mit.edu credits to draker for 1st bonus icon and to mondaymuncher for the design of the black icon and the 2nd bonus icon
