During this month, your 17-month-old 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 two-to-four-word sentences
•   Play make-believe games.
Keep in mind that each toddler develops at a unique pace, and your little one may develop these skills a little earlier or later than this.