you know how a lot parents do it?
Ok they may have their fags (I spent roughtly £40 a month - what I get to keep of my money from playing the organ at church) on tobacco - that "feeds" my, errm not sure how many, a day habit.
I rarely (if ever) go out, I rarely by myself new things, when I was single I often used to skip meals and split my portion between the DS's so they were full up on good food.
I'd scour the charity shops, and freecycle, I would accept hand-me-downs (got a gorgeous bag of "designer" stuff - some of it hardly worn!) from a friend a year or so ago.
I shop in the 99p shop or Wilko for cheaper household essentials, kitchen equipment, just recently (back as a couple) I bought two wall mounted CD/DVD shelving units (I know it's chavvy to have them on show ) they cost me £10 (for both of them) from QD stores.
I frequently "go without" so that my children can have - and as I mentioned in a post earlier I'm lucky that I don't have additional costs that many people on benefits do - essential cars, trips to drs/hospitals, special dietary requirements, extra care costs for children/OH's with disabilities. I'm lucky enough to live close to the town, schools, nursery, supermarket. I don't have to pay exorbitant bus fares just to get my weekly shopping or take my DC to the doctors/school/park.
I'm lucky to have babysitters that refuse to accept payment to look after my children for extremely rare nights out (teenagers from church and my best friend) - means that money for those nights out can be spent on going out instead of childcare for the night. It suddenly become affordable to spent £20 down the pub once in a blue moon when you don't need to pay out £25 for babysitters.
A few years ago we had to feed a family of (then 4) on £15-20 a week for a while (including nappies for a toddler)- it was bloody hard but I did it, and as a result learnt vital lessons which mean I can now comfortably feed a family of 5 of us nutricous meals (and buy nappies) for £50-60 a week.
My DS's are currentl playing on the Wii and PS2 (now have both in the same house since DH and I are back together - I always vowed they'd never have both in the house but I decided not to make them choose when we got back together) - meanwhile FIL is watching TV on an ancient TV that I'm sure is going to die very soon as the blank "patch" on the screen seems to grow every week. The hob still (after nearly 5yrs) still only has 3 working rings, the greenhouse (with mising panes of glass) is still used as a shed for storage, the damp in the bathroom will remain damp (although thankfully DH has managed to crawl along the roof of the downstairs bathroom and discovered the damp issue isn't actuall massive job to fix), the ancient GHC will stay, there's still no carpet in our bedroom, our bed is falling to pieces (but DS's all have newish beds).
In short we make sacrifices so that our children can have more.