My DD sat at 6 months and crawled at 12 1/2 months. What your baby is doing is "technically" right according to the Gymbaroo lady I saw. She said no baby should EVER besat deliberately and that they must crawl first and then sit themselves so it's fine! We sat MAckenzie cause I wanted her to have idff view onthe world and she was not looking like crawling at all. I wonder though if we hadnt sat her if she would have crawled earlier???