I order tons of little things from them now that I have prime. They have good deals on things like batteries, toilet paper, peanut butter, etc. It's all stuff that doesn't qualify for FSSS, so I'd be paying $5.95 for regular shipping, but instead I get it in a day or two for free.
When the student prime runs out, you have the option to renew at half price. Is there a similar promo for mom? I'll be able to get full prime membership for $39/year, which I will absolutely use the value of.