The Interactive won't play automatically.
Chrome and Safari implemented new autoplay policies. If you have trouble starting the activity, view instructions below.
Chrome: Add chrome://flags/#autoplay-policy to the browser URL field, then change "Autoplay policy" to "No user gesture is required." Restart the browser, navigate to the interactive, should work.
Safari: Go to Settings -> Websites -> Auto-Play and next to digital.scetv.org select "Allow All Auto-Play." Refresh the page, should work.