If you are looking for something to help you get a perfect edge I have been using an Edgepro Apex sharpening system for years and it produces an amazing result. You can pick the stones you want and there are even some aftermarket options available. The benefit of this system is that once you pick your desired sharpening angle, the system will keep that angle consistent across the knife edge. I really like mine. They also just released an updated version called the bevel tech with some upgrades/improvements. They also let you send in a knife for them to sharpen to test out the quality of the results.
“that kickball with the plastic ring you bounced on“
It was called a pogo-ball. I loved mine. I remember doing skate grabs etc with it. I also remember a trick where you spun it like a top with your feet, jumped up so your feet were disconnected from it, and then landed back on it to continue pogo balling. It was a weird but fun toy.