Answer:
What invention lets you look right through a wall?
I have 24 keys but cannot open any locks. Sometimes loud sometimes soft
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
In the sun I like to play; in the rain I goes away; walk or run I always follow; in the mud I always wallow.
Walk on the living, they donβt even mumble. Walk on the dead, they mutter and grumble. What are they?
Give it food and it will live, give it water and it will die.