Copper sulfate crystals are among the easiest and most beautiful crystals that you can grow. The brilliant blue crystals can be grown relatively quickly and can become quite large. Here's how you can grow copper sulfate crystals yourself.
Use marshmallows, toothpicks, and spaghetti noodles to make towers, letters, and shapes. This engineering activity is perfect for kids ages 3 and up!
Instructions for Growing Naturally Colored Crystals