I don't know what it was about that program that was so entertaining as a child. Maybe it was just easy to tinker with all the knobs and sliders and discover what would happen. The one I remember wasting the most hours on was the pins and marbles. A ball would pop out the top of the screen and fall down and hit the pins. But every now and then a smiley face would fall out and would make a little "meep" sound every time it hit something. And me and my brother and sister would watch it go until a smiley face popped out and we'd all shout "a smiley face!!!" and giggle to ourselves. My parents probably thought we were nuts.