Here are a few pieces forum member @Dougmeister was nice enough to share with my son. If love any help in identifying them. I know one is Constantine and another has a "peace offering" reverse but that's about it. Thanks in advance!
The 2nd coin is Constantius II, 337-361 A.D. bearing the obverse legend DN CONSTANTIVS PF AVG. The reverse is a soldier spearing a fallen horseman, with the legend FEL TEMP REPARATIO. "The return of happy times" in English. I'll let someone else take a stab at the first and third.
Imagine living in a time and place where a picture of man plunging a spear into another man with the label, "The return of happy times" didn't seem out of place. Hah!
The last one is Constans, minted around 347-348 A.D. Obverse inscription: D N CONSTAN-S P F AVG. The reverse is VICTORIAE DD AVGGQ NN and depicts two Victories facing each other and each holding a wreath and palm branch. The reverse celebrates the victory of two of the sons of Constantine, Constans and Constantius II, over their brother, Constantine II in the civil war that ensured a decade after the death of their father.