This has to be one of the most creative bento box ideas I've ever seen. Make a rice computer for Dad's bento box lunch. Use plastic wrap to shape two squares of rice. Cover them in nori seaweed and cut a window for the "screen". The keyboard was probably made from kameboko (cooked fish cakes), but you could cut squares from sliced cheese. The red, green, and yellow parts I'm pretty sure are bell peppers, but I'm not sure what the blue is, This bento takes some work, but will be one he'll never forget.
Rico & Coco