Suggestions - do all, some or none!
1) Walk somewhere else. Your daughter is learning all the time. Even if you're just walking around a housing estate, you can talk to her about the things you see.
2) Play dressing up. Doesn't have to be expensive. Make her a black cape out of bin liner. Make a paper crown. Let her stick bits of shiny paper and cotton wool and buttons on it. Make papier mache masks - just mix PVA glue (dirt cheap) and water, then paste strips of paper onto a balloon. It's lovely, messy, cheap fun.
3) Paint pictures. She won't care if you can only afford to buy one colour. Throw an old sheet on the kitchen floor, strip her down to her nappy, give her some paper (buy a roll of wallpaper lining paper - 20p!) and let her go for it with whatever paint and whatever bits of her body come to mind.
4) Chuck her in the bath after all the painting and sticking. Get in with her! Bathtime splashtime is great fun with mum, it's cheap, cheerful, gets her clean, and gets her confident with water.
5) Check out your local library. They're not filled with old dears going "Shhhh" any more. My library has children's story time, and they all sing and dance together. It's a nice social event for mums too. You might even meet another mum who's as bored as you are.
6) Bake cakes. Obviously, she's not going to be putting them in the oven, but you can buy cake-making kits in the supermarkets for about £1.50ish and it's another messy fun time playing with mixture, spooning it into paper cases, and best of all, decorating them with icing afterwards.
7) Play in the garden. Kick a football around, play 'follow the leader' and take turns. Plant seeds. If you don't have a garden, make egg heads! Hard boil an egg, take off the top and scoop the insides out - have it for lunch? Then put some kitchen roll at the bottom of the eggshell, wet it and throw some cress seeds on. Draw a face on it. In a few days time, he's grown hair - and you can eat it too!
8) Do some of that housework. Your mum says you don't have to do it, but children learn by example. She's not going to be running around with the Dyson, but she can help you load the washing machine, put her toys away, carry your duster for you. My daughter passes me the washing out of the basket when I'm hanging it on the line - she regards it as her 'job' and gets seriously miffed if I do it myself.
9) Get a job. If your mum's home part-time, then ask her to look after your daughter for a couple of days and get out. Of course you love your daughter, but you need some 'me time' too. It'd also bring a bit more cash in, and open up other opportunities for things to do.
10) Read stories together. Get books from the library, books for toddlers with bright, exciting pictures. Read them aloud, pointing to the words as you go. She'll start to make the connection that those black squiggles are meaningful, and she'll love sitting on mum's lap and looking at the pictures. Give the characters funny voices when you're reading. Talk to her about what she can see on the page.
That's me out of ideas for the moment. These are things that I've done with my daughter over the last couple of years (she's two now) and some might be suitable, others not, depending on your daughter's development - they're all different after all.
Enjoy!