Inside the box is a foil packet that you cut apart for the box and accents, little packets of fruit flavoured candy powder, and a container for making the shaped candy that includes a little cup for measuring the water.
Here's a video by Kawaii Kakkoii Sugoi showing how to make the various components.
And the finished bento box with broccoli, spaghetti, fried chicken (meatball shaped), fried egg, hotdog octopus, and rice balls (onigiri). I've displayed everything in the containers made from the foil packet.
Still, it was a lot of fun making everything.