Needs to be fun, simple clear, also classy.
Some ideas would be a brain(mind) that is shaped out of puzzle pieces and the pieces are a few different colors signifying different areas of the brain being lit up.
a fun one might be a little brain with legs and arms lifting barbells etc.
Open to all ideas to begin with
demographic is people over the age of 50, has to look fun on a poster,
about being staying sharp, regaining youth, empowering yourself, etc.