You will see lots of changes and new developments in your baby between 3-6 months. They will start recognising and responding to familiar people and objects and developing a social smile. You should (hopefully) be getting a bit more rest as baby should be able to sleep 6 hours on a night. Baby will also begin experimenting with the concept of cause and effect and begin making new noises including some consonant sounds.
There are a number of activities you can build in to your daily routine to develop and engage your baby's development and learning;
Sit down with your legs straight and lay baby across your legs on his tummy. He must be able to touch the floor with his hands. Put a hand on his bottom or back to give some support. Put a toy on the floor in front of him and encourage him to play. This exercise is good to help develop coordination.
To help stimulate baby's desire to learn you should encourage him to touch various items of all
shapes, forms, materials and textures. Give him big items, small items (but not small enough to go in his mouth), round, square, long, short, thick or thin. Remember, don't just use toys – make use of anything from kitchen utensils to fruit.