If your color sense is already well developed, exploring a new technique that shows off your color strength in an exciting way would be a challenge. For a stronger challenge, you may want to work in colors you are usually not attracted to.
Is your work predominately smooth in finish or heavily polished? Perhaps exploring texture would challenge you?
Develop a new strength with your work - set yourself free - work with movement as a challenge!
Do you have a desire to break out of 2-dimensional work? Take the leap to the 3rd dimension and breathe new life into your creativity!
Is there a complementary material that you've always dreamt of exploring and never found the motivation to do so? Now is the perfect time! For example, polished glass or metal are very compatible with polymer and can add a new dimension to your work.