Eating little bit of everything is one of the key philosophies of Japanese cuisine.
For presentation, it requires putting together little bit of everything in a coordinated manner. Beauty: well balanced nutrients intake, enjoyment of eating and aesthetics - it's almost an art.
Bento lunch box (to go) is a simple, daily-life version of little bit of everything. At home, Moms have been making Bento for family.
There are a lot of websites that talk about how to make Bento; authentic(like the pic), casual, fun and Bento for kids! Check them out. Or you will find whole bunch of information just by Googling by "Bento box".
Great alternative for brown bag.
Lunch in a box