Answer:
I am free for the taking. Through all of your life, though given but once at birth. I am less than nothing in weight, but will fell the strongest of you if held.
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
A home of wood in a wooded place, but built not by hand. High above the earthen ground, it holds its pale blue gems. What is it?
Grows from the ground, bushes and grass, leaves of yellow, red and brow, unruly plants, get the axe, trim the hedge back down.
I'm full of holes, yet I'm full of water.
People take me on walks and I run and have fun. What am I?