In 2004 LEGO released 5 Baby sets. The largest Baby set from 2004 was
5455 Stacking Jungle Set with a piece count of 8 and a retail price of $24.99. The current estimated value of all these Baby sets from this year is about $375.15 which represents a 552.1% growth.
The Baby theme is designed for very young children and was first released in 2000 as part of the DUPLO style theme. It the predecessor of DUPLO Primo theme (1995-1996) then the LEGO Primo theme (1997-1999). LEGO Baby was discontinued in 2006. The bay parts where not that compatible with standard LEGO bricks since the bricks are larger to prevent babies from swallowing them. However, standard bricks of the same length and width can be attached to the bottom of Baby bricks and adapter pieces are also available.
2004 LEGO Sets
2004 was a shakeup year at LEGO, coming off of 2003 with record losses. Some significant events include the release of the QUATRO System for very young children, and most notably the replacement of many long-standing LEGO colors including gray, dark gray, brown and violet and the introduction of some new colors like light nougat which ultimately became the skin tone for many minifigures. In 2004, The LEGO Group created a partnership with Ferrari and a number of LEGO Ferrari sets were released that year based on Ferrari’s Formula 1 racing cars. New themes released in 2004 included Maersk, Knight's Kingdom II and Ferrari under the Racers theme. LEGO discontinued the Adventurers Orient Expedition, the original Spider-Man theme, LEGO World City and Gravity Games.