hi, i'm reading brian greene's "the fabric of the cosmos" and in it he explains what a higgs field is. he says the potential energy of the field is shaped like a bowl with a raised peak at the center of the bowl. further he says the vertical height above the bottom of the bowl represents the energy of the field, and the horizontal distance from the center/peak of the bowl is the 'value' of the field. so, if the field(?) rests on the bottom of the bowl, the energy of the field is 0, but the 'value' is not zero. what does it mean for a field to have 0 energy but a non-zero 'value'? likewise if the field(?) is trapped on the peak in the center of the bowl, it has a 0 'value', but positive energy. what does it mean for a field to have a 0 'value' but still contain energy? please assume your audience is a 10-12 year old, so that i have a chance to understand.