This dashboard was prepared using a database created from my kids' personal LEGO® collection. I created the database by collating the kit numbers and names from all the build instructions they had been saving since the very first kit of a LEGO® City fire truck gifted to them in 2004.
As I did not have a source for the date each specific build kit was added to their collection, I used the release date for each build kit as a proxy.
And as a point-in-time analysis, it's important to point out that this collection continues to grow... I am already planning an updated version after 25 + years, as their passion for LEGO® build kits is still strong.
If you're interested in reading more details around my process for creating this fun and creative dashboard, check out this Medium article I wrote: How Reviewers Can Level Up Your Data Viz. In the article I walk through the numerous iterations that happened on the route to the stylized tree-map/waffle chart in the middle of the dashboard... and most importantly how engaging reviewers in your data visualization process can really help you develop your skills.