How French investor Gabriel Jarrosson grew from posting on YouTube to raising a fund that backs YC companies exclusively.

On the outside, it’s a LEGO-like universe, where you can immerse yourself in a virtual brick world. But as one Taft family found, this video game, targeted at kids, could be dangerous.

In the quest for the Sanguire Rod, players must travel to a location called the Underground Music Venue in Fisch. Since there ...