Lunches to put in a bento box?

I have always admired how much more beautiful a traditional style bento box from japan looks than a lunchbox. The only problem for me is that I'm not expert on making the food that goes in it, such as the rice-balls and other cute things they do. Most of the food I wouldn't even know where to purchase. What are some more average but still healthy items that I can put in the boxes? I've already thought of just sliced fruit and certain vegetables, but can anyone give me some ideas on items that I can get almost anywhere?Lunches to put in a bento box?
dil dooba

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