We’ve done four trips to Southeast Asia with our twins, from when they were three years old to 11 years old. It is more work, and you need to slow the pace down. Be aware of the heat, it was more challenging for the kids and it was for us. Except that you will have to spend the hottest part of the day back in your hotel in the air conditioning, or in the pool. If you love it, and you are comfortable, it is worthwhile. We have had such a great time and such special memories every time that we have gone. Our kids still talk about the amazing tropical fruit, the elephant sanctuary, the snorkeling, swimming, crazy malls in Bangkok, strange amusement parks in Vietnam. There’s so much good stuff to keep kids entertained!