Can%20you%20form%20the%20Flexi%20Cube%3F%20Twist%20and%20turn%20the%2012%20connected%20pieces%20to%20make%20a%20perfect%20cube.%20Once%20you%20get%20the%20basic%20shape%2C%20step%20up%20the%20challenge%20by%20forming%20one%20of%20several%20color%20combinations.%20Pick%20it%20up%20and%20you%20won’t%20be%20able%20to%20put%20it%20down!