Astonishing? Incredible? Such words seem too weak for Theo Jansen's marvelous beests! I'll go with 'monsterful' (an obsolete word meaning rare, extraordinary, marvelous).
Theo Jansen's Strandbeests - I swear these wind-powered creatures are the coolest thing around!
Strandbeest 'Genealogy' - A 'family' album of the Strandbeests from Theo Jansen's own website. Click on any of the Strandbeests to see a short video of them in motion.
My Creations: A New Form of Life - In this 10-minute TEDx presentation, Theo Jansen talks about his Strandbeests, why he creates them, and how they work.
Build a Strandbeest Yourself with this Mini DIY Kit - Similar to a LEGO project.
A Walking Bicycle That Uses the Mechanical Design of Theo Jansen’s Kinetic Wind-Powered Strandbeest - Another monsterful application of Strandbeest thinking.