The 4 are robots with blue robotic eyes.
Tibera is a sky tower with blue robotic eyes on the windows,
Raller is a roller coaster that moves like a snake and has blue robotic eyes,
Rick is a semi truck with a log carrying trailer and has the blue robotic eyes on the windshield,
7271-34 is a 747 jumbo jet an airliner and the blue robotic eyes are on the cockpit windshield. All of them are robots but act like they are alive and they are a bit bigger then a adult male human not as big as a truck.