Yes, the hands behind the feet was a big one till she figured out how to make it all work and get up on her hands and knees. For the longest time she scootched along on her belly with her face still on the floor on one cheek or the other. LOL I actually got a big remnant of vinyl/naugahyde, almost 2 meters square, and put it over our living room carpet so she had something to crawl on w/o getting rug burn; when we went to visit grandparents I was taking a big quilt to put down for the same reason.
Onc she showed an interest in any of her toys (or in anything, for that matter), it was a matter of putting her where she could see it and helping her push herself toward it and then letting her have at it when she got it, along with lots of encouragement.
The way our schedule worked, she'd feed on waking, then spend some time in the bouncy seat and we also did some stuff with her grasp reflex and made funny faces at her and so on, and once the food was settled down more she'd be spending time on her tummy, starting small and working up. It wasn't a big deal because we also had her sleeping on her tummy from the get-go, much to our pediatrician's consternation. :? (You would never know from her that it wasn't really so long ago that "they" recommended tummy sleeping and discouraged sleeping on the back. :roll:)
Anyway, one day Nat worked out getting on her hands and knees. I don't think I put her down that way that time, I just looked over and there she was, looking like she hadn't a CLUE what to do next. Then she graduated to pulling up her knees, then pushing her body forward onto the floor, then bringing up her knees again and pushing forward again, and moving around that way. A couple weeks ago she started pushing her bottom up into the air and trying to bear crawl, and then a few days after that she started really crawling.
That's how it's worked for us. Not sure how "textbook" we are in that regard, but I have to say the results have certainly astonished me. :shock: