The Village (Prince Regent Street Trust) have requested to be able to set up a trip with a value, which is a voluntary contribution. Some parents can't pay anything toward the trip, some parents can partial pay or pay in full.
Suggestions so far;
Use the 'Donation' tick box in settings, but, this sets the item up as a £0.00 item which misleads parents into thinking they don't need to pay anything at all.
Use the 'Part Pay' tick box in settings, but the parent MUST make a minimum payment of at least £0.01 (dependant on the payment method used), in order to provide consent and go through the checkout process.
In ParentPay, they could set up a trip, and tick 'Voluntary Payment', and parents could choose whether or not they wanted to make a payment, and choose the value of that payment.