In 2004, LEGO released 5 Baby sets, all of these sets have been retired. For that year, the total price of all retail sets cost $68, today those sets are valued around $394, a growth of 479%.
Most valuable 2004 LEGO Baby set
5455 Stacking Jungle Set $179.85
Highest growth 2004 Baby set
5458 Pull Along Duck and Duckling +678.74%
5 sets

5436 Stack 'n' Learn

Theme Baby
Year 2004
Pieces 2
Availability Retired
5436 LEGO Baby Stack 'n' Learn
Retail $2.99
Value $5.84
Growth  +95.3%
Annual growth 3.2%

5453 Baby Elephant Stacker

Theme Baby
Year 2004
Pieces 6
Availability Retired
5453 LEGO Baby Elephant Stacker
Retail $9.99
Value $17.69
Growth  +77.1%
Annual growth 2.8%

5454 Stack & Learn Giraffe

Theme Baby
Year 2004
Pieces 5
Availability Retired
5454 LEGO Baby Stack & Learn Giraffe
Retail $9.99
Value $34.53
Growth  +245.6%
Annual growth 6.1%

5455 Stacking Jungle Set

Theme Baby
Year 2004
Pieces 8
Availability Retired
5455 LEGO Baby Stacking Jungle Set
Retail $24.99
Value $179.85
Growth  +619.7%
Annual growth 9.9%

5458 Pull Along Duck and Duckling

Theme Baby
Year 2004
Pieces 7
Availability Retired
5458 LEGO Baby Pull Along Duck and Duckling
Retail $19.99
Value $155.67
Growth  +678.7%
Annual growth 10.3%