Just buy some small boxes from the internet and put them in the storage room. I am an organizer and a collector, and I like collecting souvenirs from all stages of my life. For example, greeting cards sent by primary school students, diaries written by middle school students, letters written by college students, stones picked up at the seaside for the first time, plane tickets for the first time, reading notes, work logs, certificates, handprints and footprints of children at birth, grandpa's paper-cuts and Chinese knots, maps of traveling alone, terracotta warriors and horses in Xi 'an ... all kinds of strange things are full of memories.