Glowing Ice Ball Materials
This is a glowie that has been sealed and frozen inside a water balloon.
- LED (light emitting diode)
- small 3-volt battery
- wax, tape, or a small plastic baggie or another balloon
- small balloon (7-9" diameter balloon works well)
- Make a glowie by inserting the battery between the prongs of the LED with the long LED connector on the flat (+) side of the battery.
- Seal the glowie. I wrapped the connectors with tape and placed the LED glowie in a small plastic baggie, but you could dip the glowie in melted wax. If you choose to wrap the connection with tape, but not enclose the LED in a baggie, make sure the tape is non-toxic (if you're using this project for food/drink) and that you have a really good seal around the battery. If there isn't a good seal you'll short out your glowie and get nasty corrosion products in the water.
- Place the sealed glowie inside a balloon. If you didn't wrap the ends of the LED well, you'll probably puncture the balloon, so be careful about that.
- Fill the balloon with water until it is the desired size for your crystal ball.
- Place the water balloon in the freezer and freeze it.
- When you're ready to use the glowing ice sphere, cut away the balloon. I do not know exactly how long you've got before the battery charge is expended, but I left one in my freezer for a day and it was still glowing when I removed it. My recommendation would be to allow 6 hours for the crystal ball to freeze and then to use it sometime that day.