The Amazing Crystal Garden - Grow Your Own Crystals

Grow your own crystals at home! 
Put rocks in a small dish, add vinegar and leave in a warm spot. Crystals will begin to grow within 2 days, but can take up to 2 weeks. In the last few days, add your choice of food coloring to the vinegar. This will gradually seep into the crystals. Soon you will have your own colorful "Crystal Garden"!