If you are planning a children's party then why not think about having a pond themed occassion, where you'll have fun and at the same time raise money to help conserve ponds?
Pond Conservation have teamed up with the organisation 'Parties around the World' to promote the 'Frog party'. It' all made easy for you and all the information and materials you need are on the PAW™ website:
'The host of an upcoming birthday party can use PAW™ to ask guests to make a donation to a PAW™ charity of their child’s choice, rather than bring a present. Since donations are made through PAW™, it is fast, simple and easy to use. You can set up a dedicated party page, invite your guests, track their RSVPs send thank you emails – and the great thing is that everyone can keep track of how much they have raised for your child’s party theme.'