Cardboard girl Danko, her friend Danta and craft master Mr. Snips team up to make toys out of cardboard. Danko wants a microwave that's shaped like her! Mr. Snips transforms cardboard into a microwave. You can even peep inside it.
Hints to make it yourself are available at https://www3.nhk.or.jp/nhkworld/en/tv/danko/20230107/6039006/.