Rusty Scissors

I have challenges spelling "scissors" when I was in school. Even now, I need to spell check! This pair of scissors was so rusty that the blades were not able to be opened. Stainless steel should not rust.

When one of my colleagues went to NUS (National University of Singapore) few days ago to apply for master degree studies, I thought to myself, I haven't been studying for years. That's bad. Our brains need exercising to keep it from being rusty. Most like I will be senile faster than my peers. Must pick up something to learn. Suggestion?