Not so because children are believers and I assume you wouldn't have a problem with women teaching school or Sunday school. Or would you?
You may be interested in digging more deeply into the Ephesians passages regarding women. Here's a salient point addressing the text you refer to:
In either case, we should notice that Paul did not employ his usual term for "the normal exercise of authority" (exousia). He chose an unusual word (authenteo) that could carry negative connotations such as "to usurp or misappropriate authority" or "to domineer." The unusual term probably signifies an unusual situation. In the Ephesian context at least, women had misappropriated authority by taking upon themselves the role of teacher.
Much more here:
http://www.biblegateway.com/resources/commentaries/IVP-NT/1Tim/Men-Women-Worship
The problem occurs when a woman takes authority over other believers. Teachers have a certain level of authority, but not complete authority. That authority rests with the Pastor of the Church.
A good example of a woman in a teaching ministry who is still obeying the limits set by Scripture upon women is Beth Moore.