Leyton has been in crawling position since before Christmas. He'd rock back and forth, he'd lift his knees. He'd centipede across the floor. He just couldn't figure out the arms. In the past week we could see a change because while he wasn't crawling, he was figuring out ways to get to what he wanted and sometimes that would involve using his arms. Last night he finally started to put it all together. He loves knocking over towers of blocks so that was all the motivation he needed to crawl.
Personally though, I love the little centipede at the end!