We bought Gene a tunnel a couple of months ago. He didn't seem to notice it at first, but over the last week, he suddenly started playing in it all the time. He will sit in one end for a minute and then take off crawling to the other end. It also has mesh windows. He looks for me through the windows and giggles.
Lucky for all of you, I have a video clip of him laughing and playing in his tunnel. I'm sure you will agree that he's pretty much the cutest baby boy. Ever.
PS -- I've created a YouTube channel for my blog! Maybe one of these days I'll do video reviews or random vlogs. We'll see!