A Crystal Garden made by combining Mrs Stuarts bluing solution,Ammonia,Salt and water poured over a sponge.

Day 1: Place damp sponge pieces in a shallow glass or plastic bowl,over sponge,pour 2 Tablespoons each; Mrs Stewarts Bluing(MSB),salt,water,and ammonia.
Day 2: Add 2 more Tablespoons of Salt
Day 3: Add 2 more Tablespoons each of MSB,Salt,Water and Ammonia (avoid getting on crystals)
Repeats steps in Day 3 each day thereafter to keep crystals growing.
(Mrs. Stewarts can be found in the laundry detergent isle at most grocery stores)