Beadboard "backsplash" and cushioned seating
Picture arrangement; corner seat; cornice board over window.
Everything - stenciled letters, cornice boards, shaded light fixture, all about kids environment, storage, colors...
map; floor pillows, kid-friendly but not "daycare-ish", nice colors
Simplicity/cleanness, colors, bean bags,rug!, bowling pins on the wall.
color blocking on the shelf
window seat and light fixture