My LO will be 6 months next week and is starting solids soon. I have heard from other mothers that they gave their babies solids bases on color (like all orange veggies first and then all green ones). Is that necessary? Also, do you have to wait a week after introducing one food before introducing another? This is all new to me- exclusive nursing is just so much easier than worrying about how long it's been since she tried one food and when to switch colors!