I definitely wouldn't talk to your mom about it; this would be an awkward conversation even amongst friends, muchless with your mom. Even as an adult with open minded parents, I am sure as hell not going to disclose what sex toys I do or do not have to my parents.
I would recommend learning what the rules are about purchasing sex toys are in your area - for example, it might be that you can buy condoms but can't be in a sex toy shop. Also, it might be that the store simply cannot sell the stuff to you, but your having a sex toy isn't the part that is illegal, nor would you necessarily get into trouble for attempting to buy a toy.
Maybe try to buy something online or something if you think you can get mail without your parents demanding to see what it is.
Worst case scenario, you just can't get anything and you could research ways to make homemade toys or something.
Whatever you do, don't do anything that could get you into trouble
