Tai Chi Fan.
Taichi for the fan. 34cm long when closed.
This fan opens with a startling and sometimes refreshing sound.
Maybe one can use it to reward pets for not being skittish about sudden sounds
which can be a natural occurrence if not something that they can help to defuse
by being calm and around you.
The sign inside is of course the Yin Yang sign that is less esoteric than the merkaba explanation of the beginning of things.