Thanks everyone for the extra ideas.
We have given $10,000 to the Australian Air Force Cadets and following are further donations:
Australian Warbirds Association ($5,000)
Gliding Federation of Australia ($5,000)
Old Station Flying Club ($5,000)
Watts Bridge Memorial Airfield ($5,000)
Lilydale Airport ($5,000)
Central Coast Aero Club Warnervale ($5,000)