Using Amazon links for examples. Use the store of your choice!

Dog puzzle toys (especially easier ones) can also work for cats. You can use pieces of kibble instead of treats.

There are many types of solo toys. Some require a little baby proofing. catnip mice can have swallowable tails/ears. So, cut those off to avoid a vet bill. Plastic toys may have sharp edges. You can use a nail file to soften them.

Foil balls are so cute pieces can break off and get swallowed 0/10.

Laserpointers are not a top choice. I don't like how crazy it makes them.

I crochet simple cat toys 10/10 uses leftover yarn. (Can give pattern if you know how to crochet)

Some more expensive options are mats that move or tower of spinning balls