The layout at Mr. Muffin’s Trains, 165 E. Main St., Atlanta, is once again open to the public. Stephen Nelson, a.k.a. Mr. Muffin, is always adding to the display, which includes incredibly detailed miniatures, one of the largest O Gauge train collections in the country, and a 40-by-60 foot operating model train layout. Mr. Muffin operates the trains for guests every Saturday from 10 a.m. to 3 p.m. and hosts a Facebook Live event at 2 p.m. each week. Visit them online at Facebook.com/MrMuffinsTrains.