What Am I Riddles

Question: What has holes on each side, but can still can hold water?

Question: A dad and his four boys stand in line.
All crowned, they toil in darkness.
Another family they see, two birds of a feather.
All of them together clad in leather.

What are they?

Question: Weight in my stomach,trees on my back,nails in my ribs,it's feet I lack.What am I?

Question: You can rest on my pad without touching the keys.
I will sing all month long as long as you pay your fees.

What am I?

Question: What is as ancient as the earth but new every month?