Yes. The strap adjusts, and the same pair suits most children and adults. If you wear glasses, try the goggles over your frames before you start a build.

They are designed to shield your eyes from solder splashes and from component legs flying off when you trim them, which is what usually goes wrong on a build. No certified safety-standard rating is on file for them, so if you need eye protection certified to a specific standard — EN 166 in the EU or ANSI Z87.1 in the US, which some schools and workplaces require — use goggles carrying that mark.

Wear them whenever you are soldering or trimming component legs. The build guide for your kit sets out those steps.