Junk drawer physics: 50 awesome experiments that don't cost a thing

1. Forces and motion : Mesmerizing CD top ; Grocery list tug-of-war ; Jar spin ; Floating coin ; Crash test dummy ; Rolling uphill ; Cork accelerometer ; Spinning force machine ; Paper drop ; Weightless cup ; See-saw candles

2. Energy : Baloon shooter ; Clothespin catapult ; Door-to-door launcher ; Ball blaster ; Quick freeze ice ; Swing your partner ; Wobble ball

3. Sound and waves : Straw oboe ; Straw trombone ; Wave machine ; Swinging wave machine ; Rubber maraca ; Rubber band man ; Air horn

4. Light : Pinhole camera ; Up periscope ; Wacky waterfall ; Star gazer ; What color is it? ; Crazy shadows ; Flash of color ; Capture the cross ; Pringles planetarium ; Kaleidofoilscope ; The never ending flame ; To infinity and beyond

5. Electricity and magnetism : Roll with it can ; Spinning straws ; Super speed motor ; Pencil lead lightbulb ; Burning steel ; No-touch race car ; Crazy chaos pendulum ; Electric magnet

6. Fluids and pressure : Snow globe ; Super squirt bottle ; Plumber strength ; Unspillable water ; Tornado in a bottle ; Pop bottle ; Ketchup diver ; Double trouble.