How do you interview for creative thinking skills in IT candidates?

I usually create a non-IT scenario like building/repairing a bridge.  I then will ask multiple questions to the candidate about the scenario including how would he/she plan for the work and the people he/she would include in the project and why.

I have found that the best way to measure this is by throwing a non-IT scenario and ask them how they will solve it. The craziest the scenario the better responses you will get. If you get a response like "I will buy a tool to solve this" you know is not the right guy.
I always try to use scenarios in cars or restaurants, so everyone is familiar with it.
Something like:
If you were working at a restaurant that is part of a franchise, and you one day arrive and see that the main ingredient for the most popular dish is gone, what are the three first things you will do?
or
Imagine you are taking your car for a service. The mechanic says that there is an underlying problem with the engine that will cause the engine to fail within the next 12 months. The repair is too expensive to afford at this moment. What are the steps you will take to minimize your risk or impact?
or any other scenario you can came up with. As long as it is not solved with IT, that will throw them out of their comfort zone and "prepared answers" and will force them to think.

When I interview for creativity, I focus on how candidates solve problems, not just whether they know the right answer. I ask them to describe times they came up with unique solutions or improved a process in a new way. I also give them open-ended scenarios—like dealing with outdated systems or launching a new product—and see how they think through it. I’m looking for originality, adaptability, and how they inspire creativity in others. Sometimes I’ll even ask them to walk me through a past project to see their creative process in action.

I often ask what their hobbies are. Are they complicated and challenging or simple?

EG. Decided to study and get my commercial drone license vs I like to lay on the beach. I enjoy remodeling my house, fixing and maintaining my RV. It shows learning new things all the time, tackling problems unrelated to IT

Don't ask all wrong/right questions or problem solving scenarios that have a 'trick' which can be missed in an interview situation. Have some scenario-based questions with shades of grey outcomes to allow different thinking. 

I've found the best candidates don't need to be guided, their creativity will come out regardless of the constraints of a question so it's just allowing the interview space for it to happen.