Build Box - Magnus Flyer by CrunchLabs Mark Rober NWT This listing is for ONE unopened box from the new build-it-yourself toy subscription that arrives each and every month. CrunchLabs is a monthly STEM toy subscription box for kids, designed by former NASA engineer and YouTuber Mark Rober. For Ages 8-12+ Imagination ignited! Well thought out STEM kits tick all the boxes! Leaves kids feeling, accomplished, creative, intelligent, eager tor more. Unlock a fun and educational 15-30 minute video from Mark Rober with every box to become an engineering superhero.