As soon as they can talk, they will use words to tell you what they need. Crawlers often get into things. Remember to babyproof the house. Use distractions when the child does something you do not like. Give the child the chance to explore safely in at least one room in the house.
Walkers can reach higher things.
They are learning to climb. Babyproof the house. Use distraction as a discipline. Tell them the rules. Start using short time-out periods.