I found this video from the Doug Aitken exhibition The Source at the Tate Liverpool, which looks like an amazing exhibition! The interviews in the online videos in this exhibition are all about what sparks creativity.
Architect Liz Diller talks about creativity and experimentation this way
"...what it takes to do creative work is naivete....if you're curious and you're naive, you step off the cliff often without a parachute or anything; and you find yourself in trouble and then you work your way out of it."
find out more about the exhibition here