Second hand books and toys do very well at ours. Parents are very generous as they like to have a big pre-Christmas clear out, and the kids love to buy it all back.
We also take donations of sweets after Halloween because parents love to get rid of it! Then we sell it back to the kids at the Christmas fair.
We also sell off the lost property uniforms at a €2 per piece of clothing. Clears out the over flowing box of unclaimed clothes!
This year we are skipping on the santa grotto and setting up a photo wall instead with a scene painted by 6th class and lots of photo booth type props.
We tried doing a simple spa room with mini manicures, ten minute massage etc but found adults not really interested as they are with kids and families. But face paint and nail varnish for kids goes down a storm.
All the students make a craft that goes on sale for parents to buy.
We rely a lot on pester power!
Local crafters (about 80% parents) take stalls at a set price to sell their wares. That adds a bit of interest for adults.
Then standard stuff like guess the weight of the cake.