Was doing drawing with my niece this weekend and discovered that CREME PASTELS EXIST and thought you would definitely like to know this. They are marketed as 'solid poster paint sticks' and they are just as gorgeous to use as you theorised. ^________________^
:D Just in case anyone else wants to test the similarity. I confess that I am curious. I have used a variety of media -- chalk pastels, oil pastels, oil paint, acrylic paint, fingerpaint, handmade red ocher paint, etc. The liquid version of creme pastels is probably closest to the latter, which I made laboriously by rubbing a nugget of red ocher into linseed oil for 20 minutes.