Riding a bike
"People talk about bike riding when they want to remind us that some things, once learned, are not forgotten. What they don't mention is how we learned. No one learns to ride a bike from a book, or even a video.
You learn by doing it. Actually, by not doing it. You learn by doing it wrong, by falling off, by getting back on, by doing it again.
PS this approach works for lots of things, not just bikes. Most things, in fact."
While on the subject of riding a bike, this video is a great way to frame the difference between how children and adults learn.
What is neuroplasticity?
According to Neuroscientist Dr Sarah McKay, it means different things to different researchers and therapists, and not everyone agrees on the (over) use of the term.
Essentially it means that the brain can be "re-wired" in response to experiences over time. Behaviour will lead to changes in brain circuitry, just as changes in brain circuitry will lead to behavioural change.
If you're interested in learning more, this book could be an interesting place to start on Neuroplasticity from the MIT Press Essential Knowledge series.