I'll have to try that experiment with my 15 month old. He's spent a lot of time on the keyboard, and he and I played with the sampler, but I didn't have him try the drums.
I didn't notice any lag, but maybe that's because my son can't stop himself from making the app go away: the home button is too irresistible. Someone needs to come out with a slip case that makes the home button unreachable.
My two year old loves too watch movies and look at pictures on the iPad but can't help herself from pushing the Home button. The iPad would be great for car trips with the right case - and the home button is the biggest issue.
Something tells me there is a big market for kid-friendly iPad accessories...
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.
I didn't notice any lag, but maybe that's because my son can't stop himself from making the app go away: the home button is too irresistible. Someone needs to come out with a slip case that makes the home button unreachable.