4-7 months the average, but babies do not learn to sit up all on their own. You need to help them! Prop them up in a boppy or hold them in your lap with as little support as possible.Sit them up in shopping carts and encourage them to hold on to the front for balance instead of leaning back.eport Abuse. 4-7 months the average, but babies do not learn to sit up all on their own. You need to help them! Prop them up in a boppy or hold them in your lap with as little support as possible. Sit them up in shopping carts and encourage them to hold on to the front for balance instead of leaning back.
He's fast become one of the most charming voices on the Internet. I must know: Who's the writer behind Karl the Fog? to wit: Karl The Fog Explains How He Got the Gig as San Francisco's Fog.
Karl Pilkington (born 23 September 1972 in Manchester, England) is an English radio producer, author, television presenter, actor and general round-headed buffoon.