When achieving larger number of something – 100 lines of code of a new product, 100 releases, 100 days of a new team – you can mark it with for instance candle lights or ballons, to emphasize the quantity of what you’ve achieved.

It sparks reflection, marks the effort and is just pretty to look at.

Use it at for instance demos, and/or invite other stakeholders to come and be part of the “event”.