A Tap on the Grid

My fingers twitched! Just like that, the stiffness melted away. I took a bouncy step forward and tapped my big yellow shoe against the gray tiled floor. Click-clack! It echoed nicely off the tall gridded walls. Over to the side hung a giant dark screen labeled 'Supporter Board'. I trotted over, stretched out my gloved hand, and patted the slick lower edge. Cool, smooth, and very solid. I can move, I can tap, and there's a whole big room right in front of me!