Which of these types of electromagnetic radiation has the shortest wavelength? a. Radio wave
b. Infrared
c. UV radiation
d. Violet

They probably don't understand either 1. what the nightmare is about or 2. his anxiety and stress

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

I'd say 8. i'd u don't so what u should u don't get what u want.