sitting on bleachers

Yet another proof that I'm not as young as I once was (as if I need more proof).  Yesterday afternoon I spent 2+ hours sitting on an aluminum bleacher seat to watch one granddaughter participate in a track meet.  This evening the same granddaughter participated in her school's arts evening.  She plays chimes and did a wonderful job.  But enjoying her performance along with three bands, three orchestras and a choir, found me sitting on a wooden bleacher seat for 1 1/2 hours. Ouch and ouch! And that's only one granddaughter.  As the grands approach their teen years I expect to have many more of these seating experiences.  I think it's time to invest in a cushion, preferably with a back rest.