It's interesting how different people have different perspectives.
In my opinion, if one wants to say he or she has been to the top of the Eiffel Tower, then by all means go and do it.
However, if one's objective is to see beautiful views of Paris that include that distinctive landmark, then the aforementioned Trocadero area across the river, the top of l'Arc de Triomphe, or (from what I've read and from the photos I've seen) the viewing platform at the Montparnasse Tower are better.
Let the Internet help you decide: search for view from X and click images on the results. Substitute Trocadero for X, top of Arc de Triomphe for X, and top of Montparnasse Tower for X, and then substitute top of Eiffel Tower for X and see which view appeals to you the most.
Even the view from the terrasse of the Galeries Lafayette department store (you can search for those too) is more interesting to me than those from the Eiffel Tower.
If you keep a close watch on your kids, after sundown at Trocadero can be pretty entertaining as well as having great views of the Eiffel Tower's lights.