It's a pretty work. "Kuru Kuru" means "round" or "revolve". As the name, it rounds and you can make a shape of heart. Through this motion, you can open the lid. It isn't difficult. It takes 4 moves to open. (It's different from the "MY-1 Secret Heart.") created : 06/2018 size : 160x40x40 mm material : walnut, others