• baby (n) a very young child (birth to 1 year) who has not yet begun to walk or talk
    - The baby began to cry again.

  • young (adj.) being in an early period of life or growth; not old
    - She’s married with two young children.

  • child (n) a young person of either sex
    - He can’t understand – he’s just a child.

  • teenager (n.) a young person between the ages of 13 and 19
    - You don't think, especially as a teenager, that something like this will happen.

  • adult (n) a fully developed person from maturity onward
    - Tickets are $2.50 for adults and $1.50 for children.