Whatever it is, it is decidedly not caused by the toys, unless you've been sharing them with someone else. If you shave, it could be an ingrown hair, or something called a sebaceous cysts, which is kind of like a zit. You should probably just tell your mom, because most lumps are something anyone can get, and not dangerous at all, but it can be calming to have it checked out even so.
And don't pick at it, okay?