That has to be my DS Lite. I'm travelling a lot in my work, and I'm always bringing it with me. I really can't understand how ppl could cope with endless hours on airports waiting for connecting flights and such before handheld consoles existed :>
I'm excluding my NES from the equation, back then I had more spare time than I could shake a stick at, and NES was really the only viable alternative for a long time in the end of the 80:s and beginning of the 90:s.