What are 'Mega Moon Crystals'?
'Mega Moon Crystals' are Superabsorbent polymers (SAP). Water absorbing polymers, which are classified as hydro gels, when cross-linked, absorb aqueous solutions through hydrogen bonding with water molecules. A SAP's ability to absorb water is a factor of the ionic concentration of the aqueous solution. In deionized and distilled water, a SAP may absorb 500 times its weight. 'Mega Moon Crystals' are composed mostly of Polyacrylamide (71%) plus Acrylic Acid Potassium (28%) and a tiny bit of Acrylic Ammonia (about 1%).
Should I take any precautions while playing with them?
Like all other toys with small pieces you should keep them away from children under 3. Keep the beads out of eyes, ears, nose etc. If swallowed they should pass through your system without being absorbed. If you are concerned, or if a large quantity of beads has been swallowed you should consult a medical professional at once.
How long will they last?
They should last over 1 year. You can even let them dry out (it may take several days) and watch them shrink back to their original size. At any time you can rehydrate them and turn them back into big bounce squishy Mega Moon Crystals'.
If you still need more info on Superabsorbent polymers (SAP) try the links below: