Ok here we go, YHR made a suggestion in a post awhile ago, about somehow making a soundboard to go along with heng long electronics, I came across this site that the guy used an mp3 player. I know he made this for a large rc tank but mp3 players are small, now granted I am not a electronics person at all and don't know if this could even work. But I will give the link so all you electronics minded people can have a go, and see what you think about possibly building this and incorporating it to a heng long board.
http://www.geocities.com/eastpac01/sound.html
Wade