Here are 3 materials that move sound easily (i.e., are good conductors of sound):

1. Steel: Metals are excellent conductors of sound due to their tightly packed atomic structure.

2. Wood: Wood is a solid material with a good density, making it a good conductor of sound. This is why wooden musical instruments like guitars and violins are so resonant.

3. Water: Liquids can also transmit sound waves effectively. Sound travels faster in water than in air.