Making things

I am designing in my head a coat-rack based on a tree shape. Somehow. What I can't work out is how to fix it to the wall in a reasonable, non-swiss-cheese way. But I want the kids to have hooks low on the trunk and us to have high ones, and one branch to be for keys and one for letters and maybe holes in the trunk for gloves... and then I want to make little wire-coathanger birdies to sit on the branches. Except maybe I want to make fish, not birds. I can't decide.