Sen. Josh Hawley, R-Missouri, wants to ban video games from selling loot boxes to kids. If you know what that means, you might be a gamer or the parent of a gamer. Maybe you discovered loot boxes playing “Fortnite” — or on your credit card statement.

In video games, loot boxes are randomized assortments of digital goodies, including weapons, costumes, and power-ups, that players earn or purchase. Gamers often open these boxes blindly, not knowing in advance what lies inside.