After a local flight, the pilot carried out a touch-and-go landing on the main wheels without incident, and then flew a circuit. On the subsequent landing, up-elevator was applied to hold the nose of the aircraft off the ground as long as possible. When, at a low speed, the nose was lowered slowly onto the runway, the nose landing gear collapsed. The occupants vacated the aircraft without difficulty; there was no fire. The nose leg casting was found to have fractured.