I have a great way of feeding my two bettas. First I put a little moisture on two fingers, dip them slightly in the FD worms and hold my fingers about two inches over the top of the tank. Man they love to dart up out of the water around two inches to grab their worms. It's what you call "interaction."
It takes a bit of training at first to get them to perform this feat. However Red is now senior member of the tank and Blooie learned from watching. So not only do they feed but they get a good workout at the same time!
Oops time to bathe and feed them. Catch ya later. Don't trip potato chip!