In 2003, LEGO released 6 Explore Being Me sets, all of these sets have been retired. For that year, the total price of all retail sets cost $70, today those sets are valued around $176, a growth of 149%.
Most valuable 2003 LEGO Explore Being Me set
5450 Discovery Bird $44.43
Highest growth 2003 Explore Being Me set
5441 Smiling Rattle +658.57%
Largest 2003 LEGO Explore Being Me set
5449 Stack 'n' Learn Sorter 13 pieces
Most owned 2003 Explore Being Me set
5443 Curly Hanging Rattle
6 sets

5441 Smiling Rattle

Theme / Subtheme Explore / Being Me
Year 2003
Pieces 2
Availability Retired
5441 LEGO Being Me Smiling Rattle
Retail $4.49
Value $34.06
Growth  +658.6%
Annual growth 9.7%

5443 Curly Hanging Rattle

Theme / Subtheme Explore / Being Me
Year 2003
Pieces 2
Availability Retired
5443 LEGO Being Me Curly Hanging Rattle
Retail $5.99
Value $30.26
Growth  +405.2%
Annual growth 7.6%

5446 Roll 'n' Tip

Theme / Subtheme Explore / Being Me
Year 2003
Pieces 1
Availability Retired
5446 LEGO Being Me Roll 'n' Tip
Retail $9.99
Value $39.85
Growth  +298.9%
Annual growth 6.5%

5449 Stack 'n' Learn Sorter

Theme / Subtheme Explore / Being Me
Year 2003
Pieces 13
Availability Retired
5449 LEGO Being Me Stack 'n' Learn Sorter
Retail $6.99
Value $26.99
Growth  +286.1%
Annual growth 5.9%

5450 Discovery Bird

Theme / Subtheme Explore / Being Me
Year 2003
Pieces 2
Availability Retired
5450 LEGO Being Me Discovery Bird
Retail $12.99
Value $44.43
Growth  +242.0%
Annual growth 5.8%

5451 Musical Sea Mobile

Theme / Subtheme Explore / Being Me
Year 2003
Availability Retired
5451 LEGO Being Me Musical Sea Mobile
Retail $29.99