6 month old bored?

I feel like my 6 month old gets bored just hanging out with me at home and playing with the same toys everyday. It’s still winter here basically it’s 20 degrees outside and snow, so we can’t go for walks or to the park. I tried looking up Mommy and Me classes in the area and there’s pretty much one yoga class an hour and a half away from us one day a week and that’s it. I don’t want him to get bored during the day! Any ideas of stuff I can do with him??