Please don't use the laser pen, I know they're sold for cats but a lot of dangerous stuff is sold for animals that shouldn't be used.
They can absolutely fuck a cat up mentally and trigger neurological issues - one reason is that they heighten a cats hunting skills/reaction times and sharpen their awareness of movement in their peripheral vision, but theres nothing to catch - each time they try and fail (and each time they will fail because.. there's nothing there) it pushes their brains to sharpen up and get better... constantly improving at a game they will never win, which is incredibly frustrating and constant frustration with no outlet is bad for anyones brain!
Swap it for food filled toys that utilise the catch-kill-dismember-consume parts of the hunting sequence rather than just the eye-stalk-chase-pounce parts.
A simple one is one of those little juice bottles washed out, lid off for a beginner and food in it - kitty knocks it about, food falls out, great... so now put it inside a small sock, a kids sock... use higher value food for a bit so it smells strong and cat is drive to grab the sock and kick and pull to get the sock off the bottle and then the food out of the bottle..
Once that's easy, you can put the lid on, but put some small holes in the bottle so its harder to get food from the bottle.
Work your way up slowly or it will be too hard and your cat will give up.
Another easy one is food in twists of newspaper, teach him to trash those to get the food then start hiding them, work your way up again from easy (in plain sight) to harder (still in view but now he has to climb), to actually hidden. This keeps him moving and looking to find food and fulfills his desire to seek, hunt, sniff and dismember!