each with different scenarios depending on whether the locomotive is in motion or stopped

Here is an MTH 30-50047 Rolling Rock Vendor Trailer

Model Number: 50002257

where they are mixed in measured amounts

Model Number: 30-50028

Bachmann 45152 HO Plasticville Farm w/Animals Building Kit Electrical_Push Buttons & Sliders each with different scenarios dependingThis is a Bachmann 45152 HO Scale Farm Buildings with Animals Plasticville Classic Kit. This is a snap together easy to assemble group of 3 farm outbuildings and animals. Since 1947, hobbyists and collectors have made Plasticville U. S. A. products their structures of choice, adding character and dimension to layouts in HO, O, and N scale. Measurements: Corn Crib 17? 8 W x 1 H x 1 D, Chicken Coop 2 W x 1 H x 1 D, Storage Shed 4 W x 1 H x 2 D.