Who will be buying the tickets? If it is a fundraiser for the school, are you expecting parents to buy tickets? If so, something with school colors or mascot might be appealing. If the school is for young children, then involvement of the children is an idea. Either artwork or hand prints (2 handprints can make a heart shape) alternating with simple blocks might draw support from parents who would like to have the quilt for the child to remember friends by.