My husband and I were avid travelers for 16 years before we had our little miracle 6 months ago. My husband does not want to take our daughter on a plane until she is potty-trained and walking. He is overwhelmed at the thought of all the stuff she needs on a everyday basis. So out-of-the-country traveling in his mind will be much easier when she is bigger. My question is: how difficult will it be to start traveling with our daughter after she is 2 or 3 years old? Any advice will be helpful.