Toy Suggestions?

Does anyone have any good suggestions for toys for a 5 month old? Sebastian doesn't quite sit up on his own, but is getting bored with his playmat. Does anyone have suggestions for interactive toys he might like?

Introduction

Hi Mamas! As I sit here in the middle of this lovely Denver blizzard, I keep thinking about how helpful our playgroup has been! It is so nice to have people who know what you're going though to talk to and get advice. I am starting this blog so we (or maybe just I :)) can ask questions, trade advice, and share experiences.

My first question is about feeding. At what point did you go to 3 meals a day instead of just 2?