The human voice is one of the most amazing analog synths. Let them learn to speak and sing before dropping what's fundamentally mathematical on them. A keyboard

The human voice is one of the most amazing analog synths. Let them learn to speak and sing before dropping what's fundamentally mathematical on them. A keyboard with presents will do just fine once the motor control is good enough and the hands big enough, perhaps. A set of pots and spoons makes for a fun drum kit, too, by the way. You are primarily concerned about creativity, isn't it?