I have two cats and they are both weird. One of them thinks it's amusing to knock stuff off tables, chew on my hair ties, and deposit random items in my shoes. I've also caught him on several occasions with his head in my purse, chewing on a pack of gum. I've seen him carry around a real banana! The other one sleeps surrounded by his toys. Cats just have their own sense of "fun". As long as they aren't doing anything destructive, let him play.
Yup: catnip. This will bring your finicky feline up to speed with proper cat toys. These suckers love to improvise. So give 'em crack for kitties......... A catnip mouse or any toy that has it in there. Catnip is harmless and it gives the cat a little buzz...... Makes them love the toy.