First think about what is interesting in science collect enough topics then matter and pics about them . desine a cover page related withthe topics u choose then the magzines name . write beatifully and try to high light important things . add interesting scince quiz, mcq , gussing games, etc. manage every page of ur magzine beutifuully and make it look attractive and full of pics and matter . amazement should be in ur magzine . at last u should add a authors page and in that describe ur expirience of making the magzine .