You've already gotten some good advice here, I just want to reinforce most of it.
I don't know how old your kitten is, but from 3-4 months to 5-6 months (individual to each cat), your kitten will be teething, and just like a human baby, it needs to chew on things. Being a cat, it will want to bite. It needs to be given appropriate things to bite, and you MUST get the whole family to participate in teaching your kitten that human hands, arms, fingers, toes, feet, ankles and legs are NOT appropriate things to bite. While some have success in getting their kittens to learn the difference between appropriate biting and inappropriate biting, it's best not to run the risk.
Tell your mom to STOP using her hands as toys. This IS teaching your kitty bad behavior.
When kitty attacks your hands or feet, DO blow the short, sharp puff of air directly in her face and say "NO." Redirect her behavior onto something appropriate - like the bendy straw - and walk away. Your kitty must learn that biting does NOT get her attention, it gets her ignored. But giving her something appropriate to bite is an important part of this learning process.
As to toys - some kitties will play by themselves. Of our six, two will play with a toy just lying there sometimes. All the rest won't play with anything unless it's moving, so we have lots of wand toys around the house. Just think of cats in the wild! They don't chase after and attack dead mice - they go after moving targets. For most kitties, it is the movement that catches their attention, and they actively need to be played with - and interactive toys are the best.
But again - with toys that are appropriate, not with hands.
Just remember to always put away wand toys where your kitten/cat can't reach them when you're not playing with them (a closet is a great place to keep them) - because they can require surgery if they eat that string.
Also, just like human children, kittens and cats get bored with the same toys. For little furry mice and balls and things, we rotate them every week. The wand toys we swap out every 1 - 2 weeks or so. We have a cloth "snake," we have feathers at the end of a string, we have a kind of papery-like sisal ribbons at the end of a string. We tied a furry mouse to the end of a leather boot lace and have that taped to a dowel rod. They all love chasing just about anything moving, and we make sure to play for at least 10 minutes a day with each of them.