Here’s the one I have:
I have another Logitech one that cost about $25.
I really, really like it. They’re really durable, easy for a kid to use, and pretty inexpensive.
Only con is if you drop it and the ball pops out, it can roll under the couch.
He needed 2 or 3 years to explore student loans. Maybe this is more complicated, so it will take infinitely longer.