You shout into a big cave…
“HELLO!”… and the cave answers you back. How?
Your shout flies out and bumps the rock.
hard rock
soft pillows
Hard rock bounces your shout right back!
Tap the cave to send a little shout!
Tap — watch it zoom to the wall and bounce back.
You shout in the rock cave. Does it come back once, or again and again?
Tap your guess!