Object permanence

I can't believe that a few months ago, in my youthful ignorance, I thought that when I couldn't see mom or dad they didn't exist. If there was something they didn't want me to have, they'd just hide it and I forgot about it. Not any more. I know that when mommy takes away a book- a paper book- it's just up on the table. I know to go chasing after mommy and find out where she is. I know that I have a stockpile of pacifiers under my crib-just wish I could reach them. And I'm starting to suspect that that man with the funny helmet head and motorcycle are my dad. Wow I have a cool dad! Gotta go find that toy mom hid from me.