My son is 16 months as well and it can be difficult to find activities because most games and toys are geared for 3 years and up. If you are looking for socialization you can take her to storytimes at the library or I know Barnes and Noble has two storytimes a week. You can also sign her up for classes at The Little Gym or Gymboree which is a lot of fun but can get expensive. I met a mom at The Little Gym with a son the same age as mine and we now get together for playdates all the time. As for activities, my son likes to play in the sand (you can buy playsand at Lowes or Home Depot) or go to your local park. He loves musical instruments, books, stacking blocks, magnetic letters on the fridge, balls, interactive songs (Wheels on the Bus,Pat-a-Cake, etc.), painting the wall or sidewalk with water, and fingerpainting with pudding. He is starting to be able to do very simple puzzles. Coloring is not easy for him yet but as long as you are supervising and helping her it could be fun. I hope this helps a little.