D.L.
Sounds like the "terrible two's" kicking in. My 22 month old son started this a month or 2 ago aswell. When he begins crying and scraming uncontrolably I send him to his room and simply say "when you are done you may come out and join me/ us". That has worked for me so far. As for the little tantrums, I let him know I understand him, I say " I know you want the keys, but they are not a toy for you"
Good luck!