The Thomas the Tank Engine Quarry Mine Tunnel Playset is an exciting addition to your child's Thomas and Friends Wooden Railway sets! Engines disappear into the coal mine tunnel and magically reappear through a secret door. The door swings open when an engine appears after descending the tunnel. Add the Thomas the Tank Engine Quarry Mine Tunnel Playset to any other Thomas and Friends Wooden Railway set to expand play! Ages 3 and up.