Which innovative product design feature did the World Wildlife Fund (WWF) introduce in 2008 that revolutionized conservation merchandise?

Conservation organizations use innovative product design strategies to raise awareness and funding for animal protection. From plush toys that make authentic animal sounds to biodegradable merchandise that demonstrates environmental commitment, these products serve as powerful educational tools. Test your knowledge about a groundbreaking wildlife product design that revolutionized conservation marketing and created a memorable customer experience.

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The 'Panda Passport' - an interactive digital adoption certificate that tracks the real-time location of your sponsored animal
The 'Vanishing Species' collection - products printed with thermochromic ink that fades when touched, symbolizing endangered species disappearing
The 'Wildlife Sound Box' - plush toys containing authentic recordings of endangered species collected by field researchers
The 'Habitat Puzzle' - 3D puzzles made from sustainable materials that transform into miniature ecosystems when completed