Funny Light Up Christmas Cards - Secret Santa Gift, Temperature Sensitive Greeting Card with Envelopes, Holiday Cards for Men Women Kids, 8" x 5.5"

🎄 Instant Magical Color Reveal (Single-Set Ready)​: At room temperature, this single Christmas card appears sleek black. Warm it with your hand, breath, or a hot mug—then it instantly reveals a glowing green Christmas tree and "MERRY CHRISTMAS" message! No set assembly required; one card equals one complete, ready-to-use surprise ✨ Hands-On Fun for One-to-One Gifting​: Engage loved ones with a simple, interactive experience! Just rub or warm the card to uncover the colorful design—perfect for gifting to a coworker, neighbor, kid, or friend (no bulk needed). Ideal for last-minute Secret Santa exchanges or casual holiday greetings 🔥 Reusable & Durable (Single-Card Value)​: Crafted from premium thermal materials, the color-change effect is fully reversible. When the card cools, the hidden message disappears—ready for repeated fun or future use. No "one-and-done" waste; this single card maintains durability to double as a keepsake 🎁 Unique Greeting Without Set Pressure​: A creative alternative to ordinary single cards! Stands out for men, women, and kids who love interactive gifts—no need to buy a full set. Perfect for gifting to a single family member, teacher, or distant friend when you don’t require multiple cards 🌿 Safe & Ready-to-Gift (Complete Single-Set)​: Made with non-toxic, heat-sensitive materials for safety across all ages. Each single card comes with a matching envelope—unbox, add a heartfelt note, and send immediately. No extra accessories needed for a thoughtful holiday greeting ›See more product details ›See more product details