One winter when I was housebound I made collages for gifts. Even using mainstream-type mags that I wouldn't ordinarily read (like Family Circle, Parents, etc.) I was able to find phrases and words and little pics to fit my family and friends.
I got the mags free from the recycling center or the library (my library had bins of mags they were getting rid of - or you can ask). These days you could probably get some via Freecycle or neighbors or whatever (alternately, there's lots of free mags you can order through the internet). The frames I got sporadically through the year - either on clearance/markdown, through thrifting or garage sales or whatever.
So, yes, this activity does involve a bit of librarying, interneting and shopping, but only a bit. The only other supplies you need are scissors, glue and paper for the base of the collage (I used old bills and statements!). Plus, in addition to keeping you entertained, you get gifts to give!
Does your library (not that again!) have movies? Challenge yourself to watch one movie a month that you would not ordinarily pick. Amazing that you can learn - or even be entertained - from pushing your own boundaries.
If you have gardens, press flowers (also makes good gifts). Get Freecycled puzzles (to pick up when you do have the car!), journal and/or write poetry or short stories, document your favorite recipes, organize your closets, or (my dad's favorite thing) make a list of every blessed thing in your house that needs to be fixed or requires attention and then work your way through them one by one. He claims you'll never be bored again!