You don't say whether your child is travelling from the UK or the USA. I suspect the former as it is rare for American primary schools to organise that kind of trip. I take it she will be travelling by coach from the UK and visit Paris or a near by region such as Normandy or the Loire. I have taken many school groups of all ages to France and always recommend to parents not to give younger children in particular large amounts of spending money which, because they are not used to budgeting or getting intrinsic value for money, will be spent on things that may take their fancy but are grossly over priced. There also is the danger that they will accidentally lose their money or that they will be robbed without even realising. One of my 13 years old was buying a souvenir in Notre Dame cathedral when she realised that a gypsy child that had nudged her in the shop had scarpered with a bank note of high value and she was left with hardly any money. Teachers have so many responsibilities shepherding their groups round and making sure all are present and none have got lost that they can't be expected to also keep an eye on how the children in their care spend their money and on what or to keep their valuables for them. Necessities in France are expensive but not what she will need to buy. Your daughter will still be too young to want expensive things such as clothing, make up, perfume or jewelry though she may be tempted by a cuddly toy. A lot of goods being sold cheaply are imports manufactured in China. She probably will just need money for the odd drink, post card, and perhaps souvenirs for herself and family members or perhaps a best friend. I would recommend a maximum of €30 per day, but if the group is travelling a long way in the UK also a little English currency in case of a motorway stop. Bear in mind that the coach driver usually has a cache of bottled water that he sells cheaper than what would be charged in a motorway station. I am sure that the organisers of the trip will have a special parents' evening to answer that kind of question and depending on circumstances will advise about how much money they think is reasonable. If not they will send parents a detailed letter about passport, insurance, what kind of clothing will be required etc, etc... . It is early yet since the trip in eleven months time. I am sure your daughter will have a fabulous time.