Temari balls, up to this point had a cotton core, that required strength to make it bounce, which meant that small children had to squat down to bounce it even 30 to 40 cm.
それまでの、木綿を芯にした手まりは、よく弾ませるにはよほどの力が必要で、幼い子はしゃがんで1尺か1尺3寸くらいの高さでついていた。