Perhaps you’ve seen the incredibly successful Slow Dance Kickstater, which bills itself as “a frame that slows down time.” The frame works by causing an object, like a feather or part of a plant, to move very quickly using an electromagnet, then slows down the object’s perceived motion, using a carefully timed sequence of light pulses.
It’s an interesting principle, which has many other uses, such as checking a car’s timing and photography. Generally speaking, it’s the same principle that allows television and film to trick your eyes into thinking that a series of static images is actually moving.
So, since you’re reading Tindie’s blog, hopefully your next question is how do I do this? To answer that question, Tindarian “Jollifactory” outlined how he made one inside of an IKEA frame in this excellent Instructables article. He also mentions another similar build and set of instructions by author “cubic-print,” if you’d like a different take on things.
If you’d like a little help sourcing your components for a build, Jollifactory has a kit available that includes the basic circuit board. Additionally, there’s an option to purchase frame mounting hardware and an electromagnet assembly if you need those as well.