For usability, two rounds of testing were carried out. In the first round, in addition to interviewing four nature-based education institutions, two teenagers were recruited to use a low-fidelity prototype. The aim was to test whether our initial idea was correct and know contents of the next iteration. In the second round, four families are recruited to use the printed Wild Hunter toolkit in a park. We did shadowing during the test and conducted interviews at the end. The aim was to find out whether parents and children love the little challenges and are able to finish them. After the test, parents said, "Wild Hunter not only gives children emotional connection to their surroundings, but also allows parents to interact more with them."As for the feasibility and viability, we showed the service and business model to stakeholders in a business negotiation way. The concept was approved by them because it is different from other similar products in the market. Project manager of Wild Friend said, "It almost met our expectations. What we want the event is easy to join, more attractive to public, and meaningful."