there's no age limit. i started taking an interest in the bible @ the age of 8-9. i didn't understand the parables back then. i took everything literally. e.g the parable about the bad and good trees. i thought the trees outside our house had to be healthy and strong coz if they weren't we'd go to hell. i didn't know back then that the trees refered to us!
good trees are saved and the bad ones are burnt. good people go to heaven and the bad to hell. but even though i didn't understand the parables back then, im still glad i read a bit of the bible.
there's a little kid @ youth. he's about 6 & he loves dancing for the lord and reciting bible verses.