@ Collin love that show. The Guru episode did a good job explain the chakras for kids. Really good introduction.
You should start from the root and work up. The root grounds you and each chakra opens you up to other aspects until you get the the crown or spiritual chakra. Your third eye is for insight, and if you just focus on that one chakra, people believe you could get migraines, even hallucinations, because energy is pooling in that one area. The energy must flow naturally through your body so there's a balance. When the chakras are balanced your third eye will work fine, you don't have to focus on just one and ignore the rest.
Each chakra is associated with a variety of sights, sound, smells, and activities. Even colours and crystals can help balance the chakra in question. The third eye is associated with the colour purple, focus on creative activities [drawing, colouring, sculpture, decorating] and rely more on your intuition over your logic. [But don't do crazy things like walk down a dark alley or gamble away all your money. Little things like what to eat or if you buy one lottery ticket by 'sensing' the numbers.]