Chody, I stand by the strong belief that children will ALWAYS do something when they are developmentally ready. It would be hard to slow down or speed up what is developmentally set for that person, kwim? I bet once he figures it out he'll have you running!!!

Don't blame yourself for the limited tummy time resulting in delayed crawling because I have read a lot about tummy time with my 2nd DD and to be honest, I think it's pretty over rated..... my DD2 hasn't ever had a lot of tummy time yet she crawled before my DD1 who had more tummy time than her. Both kids hated tummy time until they could get themselves into that position themselves!!!! It just isn't natural to a baby. So don't beat yourself up about that ok?