A Proper Tunnel

I rolled past the flower pots, hunting down a real engineering challenge! Underneath the slatted wooden potting bench, an empty, hollow red clay brick was parked sideways in the dirt. It had three round holes running clean through it—an honest-to-goodness tunnel system waiting for traffic! I backed up, lined my chassis straight with the center opening, and surged forward. Skrrr-clack! My wheels rattled over gritty terracotta dust as my cab slipped through the snug arch. I parked right in the middle, peeking out the other end like a grand express train.