|Joely Richardson||Jo Wilder|
|Timothy Hutton||David Wilder|
|Rainn Wilson||Larry White|
|Rhiannon Leigh Wryn||Emma|
|Michael Clarke Duncan||Nathanial Broadman|
|Kirsten Williamson||Sheila Broadman|
|Marc Musso||Harry Jones|
Siblings Emma and Noah discover a box full of strange items they believe are toys. As the children play with the objects, their parents and a teacher notice that their intelligence level is growing by leaps and bounds. Emma reveals that her favorite toy, a stuffed rabbit called Mimzy, talks to her and has an important message from the future.