Physics - Waves - Introduction - What are waves - Wave or Not?

A falling-items game. Items labeled with phenomena fall from the top: 'Sound', 'Throwing a ball', 'Light', 'Wind blowing', 'Radio signal', 'Ocean wave', 'Pushing a box', 'Earthquake', 'Ripple in pond', 'Kicking a ball', 'Microwave', 'Rolling a wheel'. The basket is labeled 'WAVE' - only catch things