When do babies start to scoot and crawl??

Because I swear that even though Coleman is only 6 1/2 weeks old, he is already starting to scoot! Every time I lay him on his tummy on the tummy time mat, he lays there for about 10 minutes then gets mad that he can't look out and see everything and he tries to scoot off of it. Here's a few photos of him being bored with laying on his tummy, then a video of him scooting off. Just ignore my commentary...kinda embarrassing!