We used these plans from Ana White to make two 24" shelves and one 36" shelf. Yes, Austin helped with this building project. Usually I'm way to controlling to get help, but I was pretty pregnant at the time and rational choices had to be made. If only I was that functional all the time
To attach them to the wall we just screwed them into the studs (after pre-drilling with a counter sink bit).
The whole project took maybe an afternoon and most of that was spent waiting for the paint to dry.
And yes, I'm prepping for a full nursery reveal someday soon. I'm shooting for before Norie's first birthday. :)