This is easy but, you need time and patience is required.
You should play with your kid, make funny faces make funny noises like cat
dog, tiger, lion,cow, monkey, parrot, and make funny noises like these animals
and try to get his attention. you have to make some toys by hand, like paper toys
balloons etc., in front of the kid and provoke his curiosity.
play chasing game with the kid and try to catch him etc., you know..
that will surely help...