For the children; it is a story of loving grandchildren and scientific practice implementation from overseas. Paul Gray, who is an aerospace engineer retired from the Boeing Company in USA. He used the aeronautical construction science for aircrafts and space shuttles to build up non-motor roller coaster in his yard for his six grandchildren to enjoy the fun of endless rails in express speed.
2022 Yilan Green Expo re-presents the oversea loving and merry from USA and law of conservation of energy in the Ecoark. Visitors can enjoy the fun of speed change from the gravitational potential energy to kinetic energy during the rail sliding that is suddenly high, suddenly low, suddenly left, suddenly right, suddenly fast, and suddenly slow. The facility has been inspected and reviewed by structural technicians, electrician, and architects. Please follow the instruction of our staff and enjoy it safely.
