This is one of three sets sold in 2002 that aren't new sets but is a collection of previously sold Harry Potter LEGO® sets. I am guessing that Lego did this so that people who wanted multiple sets could get them in one purchase, but I don't think they were all that popular because they only did this for a few years.
This particular gift set was a promotion from the Coca-Cola Co. The cover of the box says, "Gift from Coca-Cola," but I have not been able to find out how people were selected to receive this gift. What I do know is that is was only available in Japan, but what I find curious about it is that the back cover is in both English and Japanese.
I have never seen this gift set listed on either Amazon or eBay but I’ve included links to both sources just in case you get lucky. However, it will be much easier for you to buy the sets that were included in this gift set separately, which is why I’ve included links to each set in the description.
Set KCCHP - Coca Cola Harry Potter Gift Set
Year Released: 2002
Set Number: KCCHP-1
Name of Set: Coca Cola Harry Potter Gift Set
Book Set is Based On: Harry Potter and the Chamber of Secrets
Sets in Kit:
4721 - Hogwarts Classroom
4726 - Quidditch Practice
4727 - Aragog in the Dark Forest
4731 - Dobby's Release
4735 - Slytherin
This set also included two green baseplates
More Pictures of This Set
Image Source: All images are used with permission by m.collectablz
This LEGO® set contains small pieces that could be a choke hazard and is not meant for children age three and younger. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize or endorse this site.