Issues with first print

[thaKing]

Brought my son the Adventure 3 Pro 2 for his birthday, and we're both brand new to 3D printing. We've gone through the setup (hopefully accurately) and did the demo print of the box that comes with it. That worked just fine. He found this to try as his first print (https://www.thingiverse.com/thing:3083495). Opened the file in Flashprint and it said there were errors. Selected the option to repair, then sliced it, and sent it to the printer. It started just fine, but about halfway through the filament started "falling apart", I don't know how else to describe it. We stopped the job, but here's how it looks (see attachment). What happened? How do we do better next time? Any tips for newbies?