challenge


A challenge is a task that calls for the use of our abilities. It is something that is hard to do but not too hard, just hard enough to be interesting. Learning is the most fun when there are challenges that you can solve by working at them.


hiker looking at a cliff ahead
The ridge looks like a challenge for this hiker.
Dreamstime site: http://www.dreamstime.com/hiking-challenge-image13427838