Your baby has a much-improved memory now. He will be able to retain that you have hidden his ball behind your back, or he will be able to figure out where is the television remote, which he loves to play with, but is not allowed.
His separation anxiety will also increase because he will be able to understand when you are going out. He may panic because he might feel once you leave, you may not come back to him again. You have to handle this situation very carefully. Try not to go away when he is not looking; let him see you go, wave to him, and also make a big deal of coming back, so he slowly realises that you are going to come back to him.
During this period, he will keep on following your footsteps. He will watch you when you are doing other work. He may also start imitating you, like he may try combing his hair. Let him do all this, as long as it is not causing any harm. Imitating is an important way your baby learns. He will now prefer toys like a play phone and use it the way you do.
With his zeal to explore more, he might get hurt sometimes while playing with different things, because he hardly knows what fear is. Keep a first box ready in case of any emergency.
At this age, your baby may possibly say different two-syllable words apart from “mama” or “dada”. You may just hear him trying to say the names of other family members.