On disc 1, there are 3 bonus segments. Bonus number 1 is how a steam engine works with 765 as the demonstration engine which was also used on the Steamed DVD from 2017. Bonus number 2 is Phil Klopp's Lionel layout that was reminiscent of horseshoe curve in Altoona, which was shown in one of the very first TMBV videos: Great Toy Train layouts of America, as well as the original I love Toy Trains parts 1 2 & 3. Which is at a total of 13 minutes. And bonus number 3 is the layout of Doctor Bill Colvin. Which ran for a total of only 9 minutes, and was taken from great train layouts you can visit volume 1 from 1998. The doc's wife died in 1984. You won't believe the size of this o gauge layout. There are 13 trains running with a street car, and 2 more trains on the upper tracks. There is also a musical montage of the layout.

The Bonus features on Disc 2 contains Brooke Evans' 2 rail O gauge circus layout with a real carnival which ran for 15 minutes, Frank Battaglia's Lionel layout in the attic which ran for 11 minutes, and has a painful tragedy on August 22, 1990 when most of the house burned down in flames. Plus there is also an On3 layout of David Birmingham which ran for 9 minutes.

The Bonus Segments on Disc 3 contains: Dick Foster's lionel layout that ran for 7 minutes, and 2 parts from Roy Everett: one for the lionel little lakes line which ran for 11 minutes, the other for the model of the Buena Vista amusement park that ran for only 4.5 minutes. For power, both Dick & Roy operates the Lionel ZW transformers.

And finally for Disc 4's Bonus Segment, there are only 2: Martin Fitzhenry of the Boston area where he later appeared in TM's short lived toy train revue reboot number 5 For only 10 minutes, and also 11 minutes of unique o gauge action with Jim Ford, James Marter, and Rege Schilken.

Overall, NKP 765 engineer Rich Melvin did a decent job narrating this 4 volume set.

Additional remarks by Steamboy:
Narration: Just enough.
Would kids enjoy this? Maybe.
Image quality: Good.
DVD Value: Seemed a little high, but not too bad.
Recommend to others? Yes.