Having just hit theatres, the movie will likely be a hit with the younger crowd. My own six year-old daughter enjoys the TV show and is looking forward to the movie. She's unfortunately not a strong reader yet, so playing the game requires an adult's presence, as there is reading before each of the various sub-games.
The The Wild Thornberrys Movie is split into three parts: Story Mode, where poachers are threatening a number of animals as played out in twelve different games; Mini-Games, which is comprised of seven different games, including jigsaw puzzles, sliding tiles, a card-based car racing game, and a rock painting game; and Multi-Player Games, where two players share the same keyboard on a split screen, racing in two different games or navigating through a maze.
Most of the games are generally fun, although some can be quite frustrating. For example, the very first Story Mode game, 'Save the Cheetah Cubs', has Eliza rescue cubs from a poacher's helicopter, but if the poacher succeeds in taking even one of the cubs, the game must be replayed. This, combined with some of the games' completely worthless AI, makes for an inconsistent experience.