MTH Premier 20-3807-1 O Scale 4-8-8-4 Big Boy Steam Loco Union Pacific UP 4014 SavoxParts This construction playset is powered

This construction playset is powered by creative kids’ free-thinking – no batteries required – so whether building and playing solo or sharing the fun with family and friends

Voice-guided Audio Assist programming tool for easy setup of almost all decoder functionality

This monitor provides easy-to-read visual readout and an audible alarm if one or more cells within the pack gets too low

ScaleTrains 39644 HO Scale GE AC4400CW Diesel "NAFTA" KCS 2000

MTH Premier 20-3807-1 O Scale 4-8-8-4 Big Boy Steam Loco Union Pacific UP 4014 SavoxParts This construction playset is poweredMTH Premier 20 3807 1 O Scale 4 8 8 4 Big Boy Steam Loco Union Pacific UP 4014 Just months before Pearl Harbor, the American Locomotive Company delivered the first Big Boy to the Union Pacific Railroad. The UP's Department of Research and Mechanical Standards had designed the locomotive for a specific task: to pull a 3600 ton train unassisted over the Wasatch Mountains in Utah. While the Big Boy is often cited as the biggest steam locomotive ever