When your little baby crosses 6 months, it is the time when he would start feeling affectionate towards you. Now your baby curls up into a ball when he is being carried. Your baby performs this gesture to feel protected in your presence.
You need to understand such signals from your baby so as to strengthen the bond of love. Whenever your bundle of joy curls up, try to caress him by patting his back slowly with your hands. You can even sing a song for him so that he feels happy and comfortable. If your baby curls up when feeding, it is an indication that his tummy is full for now. You will also notice your baby curls up when sleeping, it is normal as many babies sleep in this position.