Waiting is hard.
It doesn\'t seem to work on Sophie, but maybe So.
With the help of Nana-Downstairs, he designs and builds a Get Older Faster Machine.
He is the best at making her laugh and burp, but laughing and burping are not enough for Liam.
As the months pass, everyone says that Liam is Sophie\'s favourite.
Then, when little Sophie finally comes home, he discovers she won\'t be ready to play with him for a long, long time.
Liam waited through half of kindergarten for his baby sister to be born.
Waiting is hard