The IQ teaser ring is will test your skill and patience. You can challenge your friends via the rings to see which one can solve them first. The teaser ring is also good for creative thinking and improves both your IQ and EQ. As you solve the problem by yourself you will get great chievement. - Teaser Ring - Mini Mixed 7 - Included seven different styles of mini teaser rings - Good for creative thinking & improve both your IQ & EQ - You can compete with your friends to solve all for a dinner - Hints: Take a Break & Retry it - Functions: decoration brain training home and office fun