Make an easy and cheap crystal ball.
Instant warm compress (hot ice Experiment)
Step 1: Empty Bulb
take an empty bulb or what you want for making a round shape.
Light bulb it,s great mold.
Step 2: Crystalization
Take your instant hotpad (1$) and pour into the bulb.
Instant crystalization will forming fast.(hot ice experiment)
Step 3: U.v Led
Make a hole in the crystal and put a U.V LED inside the bulb.
Let the 2 wire out the ball.And pour some extra hot ice on the top for sealing the job.
Step 4: Power
take 3 button cells or usb power for powering your cool crystal ball.
after a day your crystral ball will be very very hard.
Can make a cool stroboscope light too.