Osborne Illusion Plans make building easy.
The Keyed Sub Trunk is a classic effect, now made easy to build with Osborne Illusion plans: It's not a flimsy illusion, but rather a prop that looks the part. Eleven pages plus instructions.
This version, unlike the "crate style" version looks muck like a traditional steamer trunk. The effect is the same, but this trunk features a keyed unlocking system that lets the audience thoroughly examine the prop..
The plans themselves are a work of art and would make a welcome addition to any workbench or library. Three pages plus instructions.