This 16-page full-color booklet introduces you the SLIDE RULE, a handy calculator that needs no any energy. It's very easy to use it. Paper craft is attached to the booklet because you may not have it (your grand-pa may do). Once you get the booklet, you can made and use the slide rule.
この作品は「作って使おう計算尺（RJ256212)」と内容の重複があります。