I tasked a team member with solving a problem today.
I defined the problem and the requirements, and provided some ideas I thought may solve the issue, but said that he should think of anything else that would also work.
About an hour later he came back with a simple solution that I hadn't thought of.
I love it when people show their creativity and come up with new ideas.
I believe that you have to set goals for people and let them have the freedom to surprise you. This helps them gain confidence in themselves and add value to the organisation they otherwise may not have.