4 Juniors, also known as 4 Plus was a theme introduced in 2003 by LEGO that targeted children of four years old or more. It was a successor to the Jack Stone theme and used regular LEGO bricks but came with a different kind of minifigure that was larger then the standard minifigures. The sets tended to have a small number of larger pieces, in order to be easy to put together. The 4 Juniors theme consisted of Pirates, City and Spider-Man subthemes.
PiratesThe Pirates subtheme contained 10 primary sets that was based on the story about Captain Kragg compeating against Cap'n Redbeard in a race for an island's treasure. This Pirates subtheme introduced a number of minion pirates as well, including Scurvy Dog, Cannonball Jimmy, Harry Hardtack, Drake Dagger and Jolly Jack Crow.
CityThe City subtheme was a direct continuation of the Jack Stone theme, however Jack only Jack only appeared in set 4655 Quick Fix Station. The City subtheme consisted of several story lines, including Construction, Police and Firefighters.
SpiderManThe Spider-Man subtheme was a small, 2 set release, that was a larger piece version of the original Spider-Man 2 theme. It was also the only movie theme for the 4 Juniors theme.