Wondering About Montessori...

Since my brain alone can't keep up with Lorelai's demands for exploratory/ educational activities, I've been looking for some kind of learning philosophy to follow as I gather activities for Tot School. I've heard of Montessori before, but I am SO not an expert. Any mommies out there have something to say about montessori? Anyone know of a website full of ideas for activities made of objects that I already own ;) ?