Calling all camping and nature lovers! Embrace the great outdoors with our "Not All Classrooms Have Four Walls" sticker – a perfect addition to your gear. Measuring 3 x 2.18 inches, this sticker is a compact reminder that the best lessons are often learned under the open sky. Printed in the U.S.A. on high-quality, durable vinyl, it's ready for both indoor and outdoor use, and its waterproof and weatherproof features make it adventure-proof. Beyond its outdoor appeal, this sticker carries a meaningful purpose. Sticker designer is partnered with ActiveMinds.Org to promote mental health awareness. So, stick it on your water bottle, laptop, or favorite camping gear and join us in spreading the love for nature and supporting mental health initiatives. Let the world be your classroom, and let's explore it together!