I found that around 4 months of age, babies start to get very distracted while nursing. With my son, nursing was so difficult I almost stop nursing all together. He just was so fidgety and distractable. I made it to 10 months with my son before I weaned him, or should I say he weaned himself. Then with my twins, I was tandem breastfeeding them using the Best-friends Twin Plus Nursing Pillow. They did great nursing on the same pillow and did not bother each other. Actually, the girls use to hold hands and nurse together until the hit about 6 months of age. It was so sweet to see my two daughter holding hands. But then starting around 6 months, they started to swat, scratch, grab, and punch each other while nursing. OH, they even started to pull each others hair- OUCH! I thought I was going to have to give up nursing.
Around 6 months old, I gave them blankies to sleep with in their cribs. I started allowing the girls to hold the blankies while they nursed. Wouldn’t you know it, it made nursing so much easier. The twins stopped hitting, grabbing, pulling hair, and bothering each other while nursing. Instead, the girls played with their blankies. They would rub them, clutch them, and stroke them while they were nursing. I wish I would have thought to give my son a blankie while he nursed because I think it would have helped him to have some sort of distraction to help him stay still long enough to nurse. My twin girls are now 13 months old, we are only nursing in the morning and at bedtime now, but I still allow them to have blankies while they nurse and it is still working!