Like the idea of taking book-case like this and making it floating (wall-mounted). Adds structural rigidity to overall frame, and is low cost for mounting and actual shelf cost. Main concern would be finding with adaquetely thickness of shelves to facilitate hanging.
Shoe growth chart! Perfectly acceptable to lose one shoe from a pair, since you only need 1 for this project...
Growth Chart! $35 - fabric growth chart (do one for each kid and give to them when they grow up)
DIY Growth Chart from mdf. I think I might have to take another look at all of those thin, painted, wood pieces they have next time I'm at Michael's. They would be so cute going down the side of this. Maybe even to mark each foot?