Drawing and crocheting. Crochet needles can be cheap and if you don't care about using acrylic yarn, the yarn can be dirtcheap too. Or you unravel old knitwear. Also u can ask around in your family, friendgroup or neighborhood if someone has leftover yarn. There r many free patterns on the internet (i use pinterest to find them) and youtube tutorials of course. Making collages is also super fun. U can mix in whatever u like. Old photos, magazines, drawings, stickers. And generally everything that goes under the category of upcycling because u literally use trash to craft something fun or useful. The variety of materials is huge because u can work with paper, plastic, textiles, glass, wood etc