Purchase Clear Spheres at http://www.stevespanglerscience.com/product/clear-spheres-40-grams Clear Spheres – water-absorbing crystals – that literally vanish in a bowl of water.
Jelly Marbles – Clear Spheres
Ghost Marbles – Sick Science! #160
Power of Bleach – Sick Science! #180
Think Ink! – Chemical Clock Reaction
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