Might be a weird idea, but im considering making a temperature blanket but for baby moments instead

My lil guy is due in feb and i have a tendancy to focus on the negative. Temp blankets are cool but i was thinking maybe using the idea to document one good thing from each day instead of the weather. A color for milestones, babies day out, a dr visit, family visits, things that so im reminded of the good and exciting instead of just the hard. Any ideas?