Prehysteria! 2 (1994)
IMDb review (edited): Brendan (Kevin R. Connors), is a rich boy ignored by his parents. His governess is on the verge of sending him to boot camp. However, Brendan finds everyone's favorite miniature dinosaurs. Then, the fun begins.
Other films in the series are "Prehysteria!" and "Prehysteria! 3", both of which are reviewed more positively than this movie. You might enjoy checking them out, too.