What is your favorite toy or gadget for baby?

Question

I thought we could share on here our favorite things for baby at this age. I am personally interested in what toys and developmentally appropriate “mamas helpers” you guys are using. Just saw some posts about water mats, and those look great!
My LO is loving this underwater simulator with wave sounds! Helps with tummy time.

Answer

I ordered my baby a book of faces from
Pinhole Press. It’s a board book that has photos of me, my husband, grandparents, aunts, uncles, cousins, pets, etc. 
Even at four months she’s been very engaged with the photos. 
Check it out!

Answer

My daughter has been loving her grow with me teepee! It goes up to age 3+