This is a variation of a famous quote from Buffy. Funny thing... When my husband heard it the first time, even though we were only friends back then, he said it reminded him of me. :)
Teach Me to Do It Myself: Montessori Activities for You and Your Child
Try removing the door to your toddler's room and replacing it with a swinging gate. It's better than keep the door open all the time and far more interesting than keeping it closed... and the best part it can keep them in the room when you don't want them roaming the house.
How To Decorate A Toddler Room For Under $40
How To Decorate A Toddler Room For Under $40 - Thinking Outside The Sandbox Family
Montessori at Home Q&A (post includes the Montessori Monday link-up collection)
DIY montessori toddler activities