Did your LO ever do that? Wyatt is trying like heck to start crawling, he's still trying to figure out the whole how to move your legs and arms thing but he'll kind of hop on his knees and move his hands, it's so damn cute. Any way, he doesn't seem to interested in sitting up. He can do it for a little bit if he braces himself with his hands on the floor. Did you little one do it? He'll be 6 months in 3 days.
My daughter is like that, although she's almost 8 months. she can sit up for a little bit, but prefers to be on her belly. she army crawls right now. she still hasn't figured out crawling on her hands and knees yet.