29. Caleb McCandliss, 20
At 18, Caleb co-founded CarChap with his mom, launching a lip balm holder that prevents melting and loss. A mechanical engineering student at Grand Canyon University, he’s sold 20,000+ units via Amazon, Etsy, and TikTok Shop. His product has been featured in Car and Driver and Good Housekeeping, and he took second in GCU’s 2023 Canyon Challenge. As president of GCU’s IDEA Club, he promotes cross-campus innovation and entrepreneurship.