you just need to not get involved they will figure it out eventually. I am not sure at which point my son started to use the home button properly but it definitely happened without our intervention in the last 6 months or so (he also started playing around with it at 2). I am worried that the ipad is bad for things like learning delayed gratification and attention span, as when he is watching dora he will let it finish but otherwise the smallest frustration leads to hitting home and starting over.