Gurbax Singh and his air resonance tubes
Amarnath Kshatria and his solenoid/RLC circuit and his 'quantum ladder'
The acceleration demonstration (radio-controlled cart)
Alice Churukian and her entries
The physical pendulum and friends
The vertical motion apparatus, interfaces and friends
The LED box and friends
The gentlemen from China and their entries.
Fred Thomas and his stepper motor driver entry.
A simple circuit that simulates a conditioned response
Double pendulum from inline skate wheels
Compact driven oscillator.
The axial vector clock-and-mirror display, plus two semi-Naval gents
Automobile force and torque apparatus (First Prize)