Answer:
A little house full of meat, no door to go in and eat.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
What can go through glass without breaking it?
When set loose I fly away. Never so cursed as when I go astray.
Hold these between your knees if you want to set a Cuban beat.
I am rarely touched but often held. If you are smart you'll use me well. What am I?