In our school we organize sometime a party called "Festa del parco", inviting the families of the students: the parties are usually on Saturday, a day convenient for the parents to come to the school.
In previous years this park's party was in the school park and in the school hall. Usually the students planted some trees and sold to their parents, house plants or little objects that they made. The proceeds of the sale were given to charity.
This year we titled the party "Verde dentro, verde fuori" that means "Green in and out". The students prepared everything in their classes and their parents went round to all the school. Some students were their guides.