Mrs. Hiroi: Mm. This is a kin character balancing toy.
Hiroi Michiaki: This is called a kin character balancing toy. If you look at this, it [appears in the shape of] kin, the kin character in kanji. [Meaning] gold.
Janell Landis: Gold.
Hiroi: Yeah. It looks like the kin kanji. There’s a reason for it. Because [the balancing toy already] looks like the character kin.
Mrs. Hiroi: That…
Hiroi: [You write it like] this, this, this, this, this, this, this [demonstrating strokes of the character]. The kin character balancing toy.
For Japanese, see this page.
For video, see this page.