I try to build new things that solve real and immediate problems...although a good mechanism GIF encyclopedia is fun too.
Hydro Dog is a full-size robotic quadruped powered by fluidic muscles built as my senior project. It can jump and bound under its own power.
An issue in soft robotics is the need for a small, inexpensive, robust, and simple to duplicate design for hydraulic and pneumatic flow control. My design solves many problems that plague designers of miniature valves for robotics.