Glass painting or candle making both make a good hobby.
you can pick up glass paints for a couple of quid at 'The Range' or any good crafts store and can paint up old jars and bottle (coffee jars, pasta sauce, drinks bottles, cheap glasses etc)
Candles are also good, you can just buy a cheap pack of taper candles from somewhere like wilkos, carefully chop them up so that you keep the wick in one piece then add a few drops of essential oil to the melted wax and pour it into an old jar. You can wrap some wire around the top to make a hanging lantern perfect for garden bbq's.
Knitting, crochet or cross-stitch are great for things to do while sitting in front of the telly.
Or you could pick up a pack of felt and make small toys, keyrings etc.
I am a serial crafter, not fantastic at art or anything but like having something to potter away at. Here's some of the doodads I have made to stop me being bored: https://s1106.photobucket.com/albums/h365/k8eyxx/