The checklist assumes that there is a digital library for Incrediworld, but since there isn't (the theme was originally produced in 2012 and brought back for the Free COVID-19 Edition), certain checklist links will 404.
Instead, the downloads are available here: https://answersingenesis.org/vbs/incrediworld2020/downloads/.
Please also see this page for additional information for leaders and parents: https://answersingenesis.org/vbs/incrediworld2020/resources/
Please let me know if you have any more questions or issues!
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