Old, or New Toys = New Lamp! Get a lamp, get some toys (or whatever items you want), get your hot-glue gun, and start gluing items onto the lamp! Spray paint the whole thing when finished and tada! New lamp!
use spray paint and a glue gun Old action figures spray painted gold + a lamp base (Ikea or Goodwill) = New purpose for repurposed toys, new skill sets & awesome bragging rights when their friends come over. Good adult geeky project, too.
Freestanding desk w ledge. Install in kids room for play now, desk later. Lower ledge good height for cooking, stacking, etc play. Desk at standard height for homework, etc later. Ledge becomes storage.