This book introduces how to use the present continuous tense for planned future actions. A little boy and his dad are planning a surprise party for someone special, and throughout the preparation process like deciding menu, going shopping, cooking, etc, they use the present continuous to explain their future plans.
In this book, children learn and practice two ways to talk about planned future events: one is ‘be + verb-ing,’ and the other is ‘be going to + verb.’ And they also practice the reason connector ‘Because’.