Of course I remember Romper Room!
And what about Wonderama with Bob McCalister? I used to love when they would make those kids eat a bunch of saltine crackers and then try to whistle!
And just a note...I once was on the original Bozo show. Got picked to come on down and play a game where we had to pass a rubber band to each other via straws in our mouths. My team lost and all I got was a Bozo frisbee...and a memory!