Hi notimetoshop
First - I think you need to have a word with the school about sending instructions home to parents, so you have a better understanding of what is invisioned.
How you can help:
Well there are a couple of ideas.
BOOKMARKS
The school should have a laminator. Your DD could make bookmarks at home on white paper (use A4 - which is the size of most lamination sheets - and cut it into strips).
DD can decorate bookmarks as she likes. Bright patterns. Big logos/ words - READ FOR FUN! or MY BOOK! Stickers (if you have some - kids magazines are great for this). Her fellow students' names - good marketing.
Place as many bookmarks as you can into a lamination wallet (leaving a bit of edge around each - a good way is to cut 5 5cm wide strips off the A4 paper - and that will give a nice border around each bookmark).
Pay the school for lamination wallets (arrange with secretary or teacher - and work out how many you can afford in advance).
Sell at school drop off/ pick up times (when parents are there with money!). If children go to after school clubs - have them bring in money next day if they want one.
Work out a nice profit. So if a lamination sheet cost 20p - sell each bookmark for 30p and that's 50p profit per sheet. If you feel they're super nice - sell for 50p - and that £1.50 profit per sheet.
TABLE TOP SALE
Gather up old unwanted toys/ DVDs (siblings included & canvas friends for donations) - and set up a stall outside your house/flat and sell toys to other children in the neighbourhood. Can do the same after school on a couple of days.
BADGES/ BRACELETS
Some children have badge or bracelet kits - and lots of materials at home already. You can make badges/ bracelets and then sell them on at school (again before/ after school at drop off/ pick up time is best - because parents will have the money).
HOT COCO/ TEAS
If the school has an urn anyway - they may allow your DC to run a tea/ coffee/ coco stall for parents at a meeting or an assembly. Parents always love a warm drink this time of year. Usually the PTA/ FRIENDS OF X school have tea/ coffee/ coco supplies - so agree you'll split proceeds with them - but you can probably run the stall quite effectively and make a nice profit - because parents will make their coffees for themselves. You just need to buy as much milk as you can for the pound (or see if PTA will donate that too). If they will buy an economic pack of biscuits.
RAFFLE TICKETS
(Only if this project is a fund-raiser for the school)
Buy the nicest chocolate Santa you can for a £1. And sell Raffle tickets (which you can make in advance on paper - need to make 2 for each number - fold A4 sheet lengthwise in half and then in half again - then mark off tickets. Cut sheet in half - and cut up through bottom row of tickets so you can quickly tear off for each purchase).
Sell tickets for 10 - 20p - and should make a nice profit.
BOOK EXCHANGE
Get a free fruit box from the grocery store and decorate it. Make posters for the school advertising that you're running a book exchange and ask students to bring in their books. Allow about a week - to collect in as many books as you can.
Make another poster announcing the start of the book exchange (and maybe indicating thousands of great books available) and say for every book taken from the exchange you're asking for a donation of 10p toward a new book fund for the school library.
You advertise the really juicy books available (so making updated posters each week) - and run the stall at recess/ lunchtime.
The £1 should cover poster supplies.
HTH