in addition to the answer above,
a boat trip (le bateau mouche) - day or night (beautiful the night)
http://www.diners-croisieres.com/
shopping: Galeries Lafayette on boulevard Haussman
(from lafayette shopping mall go to Champs-Elysée, l'Arc de Triomphe
there is also a Disney (not recommended as there is also one in HK, and it is crowded during the summer)
there are some additional places to go (but the above ones are really the top ones)
musée d'Orsayla place Vendômetour montparnassesaint germain en layePlace de la Concordequartier Latin, Saint Germain des Près
PS: In the first answer and also in mine, it is only for Paris
I suppose you visit Paris, not all France