Wow! Somebody really did you a nice favour!
What you have here is basically a complete set of the Aluminum Oxide (AL0) (red) coarse grinding stones, the green Silicon Carbide (SiC) medium grinding stones, and the blue (fine) ceramic grinding stones by FOREDOM. Plus, you have an assortment of bristle brushes and a couple of flap sanders.
VERY nice for you!!
"For almost every problem,
there is a DREMEL solution"
"When all else fails, read the instructions."