It's hard to turn a 5 minute picture book into 90 minutes of film, but Thelma the Unicorn will (probably) keep little kids entertained.
Of course there's an overarching message of being who you are etc, filled in with interesting moments about the culture of celebrity, the cult of fame, and how your favourite stars are carefully curated with marketing. As an adult and well out of the target demographic, this was the most interesting part of the film. My kid, aged 9, is a bit too old for it too but having grown up with the book, she wanted to see it. And she loved it!
To watch the full movie from this link http://adfoc.us/859373103764911
Recommended for the under 10s