"Bell" by "Quaternius"
is licenced under CC0 1.0

"Meat Tenderizer" by "Kenney"
is licenced under CC0 1.0

"Water Tank" by "Quaternius"
is licenced under CC0 1.0

"Great horned owl" by "Poly by Google"
is licenced under CC-BY 3.0

"Whistle" by "Poly by Google"
is licenced under CC-BY 3.0

"Radiator" by "Poly by Google"
is licenced under CC-BY 3.0

"Smokestacks" by "Jarlan Perez"
is licenced under CC-BY 3.0

"Caboose" by "Poly by Google"
is licenced under CC-BY 3.0