Report 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.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.
Karl Pilkington (born 23 September 1972 in Manchester, England) is an English radio producer, author, television presenter, actor and general round-headed buffoon.
1 Coby Karl - G/F, 2004â2007, Karl is the Head Coach of the NBA Development League's Los Angeles D-Fenders. He played for Los Angeles Lakers, Cleveland Cavaliers, Golden State Warriors in the NBA.  Bryan Gates - although he did not play basketball for the Broncos, Gates is an alumnus of Boise State University.