I just started doing this to practice raising my energy level up, and it works! You need an Apache tear, or any other stone good with energy.
get a coin and heads will represent your third eye and tails the solar plexus. Flip the coin and do not look at what side it landed on, your psyche is going to tell you by putting energy in that spot. Just concentrate on raising your energy up through your feet and arms. As long as you focus the energy, you will feel it. I rubbed the Ap. tear in my hands and pictured energy coming up through my feet, and I felt it enter in my third eye chakra.
It's a good practice for kids and older newbies. :)
I wanted to clarify once more that I didn't focus energy into the third eye, I focused on energy freely flowing through me and the energy itself ended up in the third eye. And the coin was heads. So I was able to see what side the coin flipped to without actually seeing it with my eyes.
Adrian, all things are composed of energy. You just don't buy one because it has energy. Even a simple stone in your backyard has energy. You may get one that has different properties though. Different properties can include: What they are used for, different types of energies on and in them, vibrations, etc. You can also charge them and connect with them to boost their power or however people may refer to it. Don't forget to cleanse first ;). Do understand this is not even a basic nor advance statement so please do some research on it if it interest you.