Which activities I can do wid my 2 n half month old baby for development of brain?

at 2 months of age your baby will be very receptive towards lights and sounds. one of the best games you can play at this age to enhance various developmental skills is to use toys or objects that have some light, or make some sound. you can also play simple peekaboo by hiding your face behind your hand and then peeping out. your baby will love it :)