They are called, Toki-no-ko from Niigata Prefecture wrapped in bluish green paper following below. Shin and Mei-Shun love such sweet balls made of white-bean jam and chocolate. Similar to 銀のすず or silver bells, shape of bird eggs has another type; little orbs of cake including かもめの玉子 and 雷鳥のたまご, while with chocolat-coating as well.