The 36th Combined Charities Fair will return to Maidenhead Town Hall tomorrow.
Organised by The Lions Club of Maidenhead, 40 charities will hold stalls selling goods ranging from toys to cakes.
Alexander Devine, Helen & Douglas House and People To Places will be among those involved.
The annual event in St Ives Road raises about £10,000 each year and the charities keep all the profit made on the day to help fund their efforts.
Prizes for this year's grand draw include a £100 Christmas hamper, a traditional Christmas turkey, lunch for four at Monkey Island Hotel and dinner for two at Holiday Inn.
Lions Club member and organiser Peter Newbound said: "There is something for everybody and it's a good chance to get Christmas presents.
"It's usually great fun. A lot of the people who come know each other so it's a social event as well.
"Originally a different charity was going to organise it each year.
"The lions ended up taking it over but it belongs to all the charities."
Doors will open at 10am for shoppers to grab a quick bargain before the Mayor of Windsor and Maidenhead, Cllr Andrew Jenner, officially opens proceedings at 11am.
The fair finishes at 3.30pm.
Entrance is £1 and refreshments will be provided in the form of teas, coffee and homemade cakes.
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