It's like he's unexpectedly peeking in from behind a doorframe! You just have to stick everything on, so it's really easy!
I wanted to make a quick and easy Doraemon, so I made him look like he was peeking in through a door.
If you're making a bento, you just have to line the bottom with the rice for the door, so it's even more simple! If the rice is too hot, the nori will become soft, so let it cool a bit first.
Enjoy Japanese food around the world.