Step 1: Access Kinderpedia using a web browser (Chrome, Mozilla, Safari, etc.).
Step 2: Select "Activities" in the menu on the left side of the page.
Step 3: Select the Group for which you want to upload the file at "Display activities from:", then click on the activity in the schedule.
Step 4: Click on the green button "Edit".
Step 5: Click on "Add file", select the desired file and then click on "Save".