[quote=Scara_blood]
...alright.What instrument can you here, but not see or touch. (easy)
[/quote]
Your voice?
[quote=WizardGirl]
Sphinx's RiddleWhat is that which in the morning goeth upon four feet; upon two feet in theafternoon; and in the Evening upon three?
[/quote]
A human, and I'm not going to explain why because I hate riddles.