Things You'll Need
Instructions
Put on gloves and fill an empty tank with chunks of dry ice.
Let the dry ice sit for 15 minutes.
Mix liquid dishwasher detergent or shampoo with water to make bubbles in the sink. Use a bubble wand or fly swatter to blow bubbles into the tank.
Watch the bubbles freeze as they hit the ice.
Pick up frozen bubbles and place them in a cold freezer. They will not pop until they warm up.