Another easy way to stimulate your betta is to hold up a mirror so that it can see its reflection. It'll see itself and think that there is a rival betta next door and will flare and act tough. However, make sure that you don't leave the mirror there for more than 5-10 minutes or else you may tire out the betta. And when you do take the mirror out, the betta will think he/she has scared the rival betta away and won, boosting his/her confidence. Not only that, but the betta will become active again, patroling its territory in case of another intruder.
To your betta, you=food. So whenever you come near the tank, your betta will rush to the top for feeding time. Then once he's done eating, he'll just swim back down and stay there waiting for the next feeding time. However, don't make it that easy for him/her to get the food. You can play a game with your betta be dipping your finger tip in the water and stick the piece of food on the tip of your wet finger. Then, move your hand 1 inch over the surface and have your betta follow it around. He/she will try to get it and might even jump. After a few attempts give it to them and do it again. Instead of your finger, you can use those really thin straws used for stirring coffee. That way, you get rid of the possibility of poisoning your betta tank with soap or other harmful chemicals.
Even if it's your favorite food, if you eat it everyday you will soon be tired of it. The same goes for bettas. Bettas enjoy variety, not just pellets or flakes. Instead, try to mix it up. Today, brine shrimp and tommorrow maybe some bloodworms. Additionally, not only does a variety stimulate your betta, but it is also one of the most healthy things to do for your betta. Balanced diet= healthy betta and healthy you.
Yes, there are toys that bettas can play with. For example, a ping pong ball can be pushed around and nibbled by the betta. Marbles plus a clear bottom = soccer. The only concern is the toys containing chemicals that can harm your betta. Other than that, they are a great way to get your betta to be active.
Teaching your betta tricks
Another way to make your betta active is to teach him/her tricks. Bettas are highly intelligent and can be taught certain behaviors such as following your finger around the tank or swimming through a hoop. And with patience and lots of time, you can teach your betta more advanced tricks such as pushing a ping pong ball into a goal or even into a hoop. Visit the betta tricks page to learn how to teach your betta tricks.