The Sago Mini friends are having a surprise party for Jinja, and they need your help to keep it a secret! Join the fun by keeping the surprise hidden from Jinja.

Harvey, Robin, Jack, Hugbot and Rosie work together to create a party for Jinja. The problem is that Jinja always seems to show up just as one of her friends is doing something to prepare - so the reader needs to help the characters out with keeping the party/playhouse a secret until it's time for the big reveal at the end of the story.