Round the Twist (1990)

S3E13 The Big Rock

Gribbs finishes reading the final poem from the Book of Love, inadvertently transforming Fay into a frog. This twist is just the beginning of their troubles. Snorrison reappears as all the adults find themselves mysteriously transported back to the 8th Century AD, leaving the children in charge. Chaos ensues as the kids navigate their new reality and try to manage the unexpected challenges that arise from their newfound autonomy.