40004 Heart, Brickipedia

Lego Build Ideas - Lego Playing Station - Kreitzberg Library at Norwich University

Are LEGO Seasonal Sets Year-Round Investments? - Brickvesting - BRICKPICKER

40014 Bat, Brickipedia

List of Set References 40000 - 49999, Brickipedia

40001 LEGO Santa Claus, Brickipedia

40051 Valentine's Day Heart Box, Brickipedia

40051 Valentine's Day Heart Box, Brickipedia

2008 Heart, Brickipedia

Category:Parts with outdated names, Brickipedia

February 12, Brickipedia

Valentine's Day, Brickipedia

February 12, Brickipedia

Category:2010 sets, Brickipedia

40051 Valentine's Day Heart Box, Brickipedia