I'd like to be the one showing her stuff, too.
You can! Show her the things that a leap pad and Dora can't- interaction, imaginative play, etc... I agree that playing restaurant or tea party can be just as instructive and perhaps more so than any lesson at this age.
I am actually a fan of Montessori methods- and I do believe that an older child should be taught how to handle materials. But the more important philosophy of Montessori is follow the child. Watch her and interact with her in a way that she's seeking. She can learn letters from a show or a leap pad. But she can not learn to converse from those. If she seems to be begging for a lesson, give her only as much as she's asked for and then see if she's satisfied or if she wants more. If she's throwing a tantrum, she may not feel like you are understanding what she wants.
