During this month, your 17-month-old baby might be able to do things like:
Build a tower out of blocks and then knock them down
Insert different shapes, like squares, circles, or triangles, into matching holes
Name familiar people or objects
Speak using two- to four-word sentences
Play make-believe games.
Keep in mind that each child develops at a unique pace, and your little one may develop these skills a little earlier or later than this.