Abstract: A trip made by a virtual creature being fostered in a virtual creature breeding toy 101 is rendered. On the virtual creature breeding toy 101, an operation can be performed to simulate a trip made by a virtual creature being fostered on the toy 101. The operation causes a passport number to be displayed on the toy 101. A user inputs the passport number on a display panel presented by a mobile application 102b being executed on a mobile terminal 102. The mobile terminal 102 sends a virtual creature code and an item code included in the number to a server 103. The server 103 combines a virtual creature image 103b with a background image 103a, both of which can be retrieved using codes associated with them. The composite image is associated with the user of the mobile terminal 102 that has sent the codes and is stored as a collected image 103d. The mobile terminal 102 can access the collected image 103d through a browser 102c and display the composite image.