@Zimba, Because of nowaday world are full of dangerous and busy. She wanted the twins to help her. She explained her plan. Which they all had to go a round the world by use her machine. The machine can brought them anywhere. They went to almost every countries in one day to solve the problem. They went to eiffel tower, tokyo sky tree, grand canyon, seoul tower, statue of liberty and many popular places. She also told the twins to not told anyone. And this was secret forever.