一個簡易的電子琴,有Do Re Mi Fa So 5個按鈕,按了會有聲音發出-A simple keyboard, there is Do Re Mi Fa So 5 buttons, the sound will be issued by the

可連結打字機的跑馬燈。 要打顯示出來的文字，每次只顯示一個字，並配上了像打字機「滴滴答答」的聲音-The marquees can be linked typewriter. Yao Da displayed the text, each show only a single word, and dubbed as the typewriter, " tick" sound