what does minor need in order to travel to mexico with out parent?

i am going with another family to visit mexico spring break i want to know what all i need in order to go with them my parent is not going but i have her permission
we are traveling by land

Call the Mexican Consulate or the US Embassy to find out I think you do need to be with a parent I don't think a signed letter will work.

These are the requirements according to the US State Department website:

Mexican law requires that any non-Mexican citizen under the age of 18 departing Mexico must carry notarized written permission from any parent or guardian not traveling with the child to or from Mexico. This permission must include the name of the parent, the name of the child, the name of anyone traveling with the child, and the notarized signature(s) of the absent parent(s). The State Department recommends that the permission should include travel dates, destinations, airlines and a brief summary of the circumstances surrounding the travel. The child must be carrying the original letter – not a facsimile or scanned copy – as well as proof of the parent/child relationship (usually a birth certificate or court document) – and an original custody decree, if applicable. Travelers should contact the Mexican Embassy or closest Mexican Consulate for current information.

what does minor need in order to travel to mexico with out parent?

huevos = balls