This is a Miller Engineering 44-2502 HO/N Small Flying A Gasoline Billboard Sign Kit

This is a Walthers 933-3092 HO Scale Greatland Sugar Refining Kit

Trainz Product Id: 11467374

you can build a balance scale to learn about lever arms

Digitrax DH150A Plug N' Play 1.5 Amp. DCC Decoder ProductID_11565696 This is a Miller EngineeringThis is a Digitrax Digitrax DH150A Plug N' Play 1. 5 Amp. DCC Decoder. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Digitrax Model Number: DH150A MSRP: $22. 99 Scale Era: HO Scale Model Type: Control & Electrical The Trainz SKU for this item is P12307228. Trainz Product Id: 12307228