KISMIF
Original: Quaker Puffed Wheat magazine ad, probably circa 1920's
One thing I learned from my days as a Cub Scout leader and carried over into my teaching of older boys - and girls - was KISMIF, "Keep It Simple. Make It Fun." - a recipe for success that actually works.
Also, "Mary Poppins" is one of my favorite movies / characters, and I've always thought Julie Andrews and Dick VanDyke were perfect for their roles.