I've been trying to 'teach' ds things because I worry I don't do enough with him!
I helped him learn to roll over (which I'm sure we all did - when they get stuck push their bum over!) and I moved his legs to help him crawl - that took longer though.
I have taught him how to cruise though - stuck a phone in his eyesight on the sofa which taught him to pull himself up on the sofa (although I agree you can't teach things like actually pulling themself up as it's a development thing - he was already pulling himself up on things just couldn't manage the sofa) and then motivated him with phones and remotes moving them slowlu down to get him to walk down!
Trying to teach him to walk with a push along toy, but he doesn't have the balance and I'm fairly sure balance is something he'll aquire on his own!
Took some presents he had doubled up back today and we got a load of Happyland stuff!!!! It's so lovely! I love the early learning centre!!!