Debbie Godfrey-Phaure, executive headteacher of both neighbouring schools, said it was "a time to celebrate the life of Kyle Rees and to enable healing and reflection".
Aron Journet, Gemma Turner, Hannah Gunning and Marc Godfrey - all aged nine when they entered - from Sutton at Hone Church of England Primary in Dartford, Kent took the award for best play.