A blind tenon joint with wedges "Jigokuhozo" (地獄ほぞ) Japanese traditional wood…
Zigzag shelf - by TDSpade @ LumberJocks.com ~ woodworking community. Would be a terrific idea for a child's room, painted white etc.
КРЕСЛО-КАЧАЛКА - МК.
Dry run without wedges would be wise.
Fishing knot - because I never remember how
how to build log cabins
How To Build A Simple Log Cabin
Homestead Survival: Knots To Know
Ok... Zombies... Republicans... Sith... all good.