Verb conjugation of "behaupten" in German

Everyone told me that I am crazy to take a small child on a road trip but I think it is the best age because babies sleep the entire day and they usually behave nicely in the car. Of course there are many exceptions to this rule.
Sorry if I did not write back, I was in Napoli during the holidays, then back at work, once again I have so much to do at the weekend, but I will do my best. Greetings from Italy. Marco.
Maybe you can tell me a little about yourself. My hobbies are reading, sports, meet with friends, but mostly I like to travel. I've been around the world ... in all the five continents.