Orthogonal - There should be at least 2 axes of rotation, one being at 90 degrees to the other. If you have more than 2 axes of rotation, you are free to chose the angles between the different axes as long as 2 of them are at 90 degrees to each other. There are some restrictions to what you can turn for this challenge. The end product should not look like a sphere or egg or obloid (oblate spheroid?). Please google obloid or oblate spheroid and also orthogonal before asking Hari to clarify.