you can check their ages by counting the cracks on its shell.
he he
The bigger the snail is the older it is, also as snails age they move slower. Cracks on snails shell happen natrually, if they are dropped or something heavy is dropped on them, a crack can form. A young snail might have more cracks then a very old snail.
There's no legal age to eat snails. But they may be "chewy", so it is best to have teeth.
in a garden
I've already answered a similar qst. Jst type in : How do snails make more snails and u'll find my answer.
You find Them under Water =]
You can find snails in dark, damp and moist areas. You can also find them in rotting wood and under a pile of damp leaves.
nowhere
they are born with it
slowly!
Snails are classed as hermaphrodites They have both male and female reproductive organs.
Snails grow a shell that stays with them their entire life. They don't find larger ones as they grow.
in damp layers
they come from gardens