This one in the first two pictures is an English half penny from 1921. Interwar period. Still cool.
Side 1: HALF PENNY 1921
Side 2:GEORGIVS V DEI GRA:BRITT:OMN:RLX FID:DEF:IND:IMP.
If you know what any of that means, let me know.
This coin is from ancient Rome. Estimated to be have been minted between BC150 and AD300.
I can't read anything on it though.