Teacher or tour guide, or check gamyeo make it easier for people ryeolpyo of employees you can manage, you can also call if you need me.
Has the appearance visible by the camera, a smartphone can be a kaleidoscope effect. Has a symmetrical shape can also be found by creating a simple pattern.
3 elements of learning in the physical amplitude of sound, frequencies, waveforms can experiment directly with the microphone of your smartphone.
Staff persons are placed ryeolpyo Enter a name for fellow employees, servants yimyeongryeol in place of a person can be checked, you can dial the phone.