We tried to teach Tyler how to play hide and seek yesterday.  Kevin and Ty would count and I would go hide and they would look for me.  That worked fine, but the concept of hiding until someone finds you will apparently take a little longer for him to understand.  Kevin would help Ty hide, but as soon as I started searching Ty would yell "come find me!" and when I got anywhere near (as in, in the same room) he would jump up and down and say "here I am! here I am!".  He loved the game, so I guess it doesn't really matter how we play