July 20, 2026
All aboard the Dad Brag Express
My two year old taught me constraint solving
Dad turns toddler train time into a brainy puzzle — and the comments lose the plot
TLDR: A dad turned his toddler’s wooden train set into a puzzle about making all the track pieces fit into one closed loop. Readers were split between calling it adorable peak dad behavior and roasting the idea that the two-year-old was the real teacher.
A dad wrote a charmingly nerdy post about building wooden train tracks with his two-year-old and accidentally unleashed the internet’s favorite kind of chaos: parenting brag discourse, joke policing, and tiny trains turned into big opinions. The basic story is simple enough for non-math people: while playing with a Brio train set, he started wondering how to use all the pieces to make a track that actually closes properly. That sent him down a rabbit hole of puzzle-solving, with his toddler cast as the tiny muse behind it all.
But the real action was in the comments, where readers immediately split into camps. One side was fully here for the wholesome genius-dad energy, with one person joking this was the sort of post you publish on LinkedIn if you want the world to know you’re absolutely crushing fatherhood. Another summed it up even more bluntly: sometimes you just have to prove you’re #1 Dad. Ouch.
Then came the skeptics, who were not buying the “my 2-year-old taught me” framing at all. One commenter dryly pointed out that the child didn’t seem to do much actual teaching, roasting the post’s theatrical style with a mock line about the kid declaring, “No Euler circuit.” Others took the conversation into gloriously chaotic real-life territory, noting that toddlers don’t care whether the pieces are supposed to fit — they’ll just force them together anyway. And in perhaps the pettiest delight of all, one reader got distracted by the phrase “Silly Billy” and launched a full cultural investigation into whether anyone has said it this century. Classic internet: dad writes about toy trains, commenters debate language, ego, and lawless toddlers.
Key Points
- •The article models Brio wooden train track assembly as an algorithms problem focused on building closed layouts from a given set of pieces.
- •It uses an unofficial Brio track guide to describe standardized piece codes and measurements, including straight segments and curve pieces.
- •Eight standard curve pieces form a simple closed circle, which serves as the baseline example for the problem.
- •The article explains a recursive backtracking search that tries pieces and orientations at open connectors and reverses decisions when branches fail.
- •The post states that later visualizations move from backtracking to constraint solving and then to a SAT solver for more sophisticated analysis.