File:MANGA 2.png

Cover of Volume 2 of the  Nichijou  manga.

References include:

A carton of 4.5% milk (no 13; actually from Volume 1)

Hakase's uneaten omelette rice (no 24)

One of Mio's wooden cube hairclips, falling (no 34)

Technically, the chapter in which they adopt Sasahara (no 29) is in this volume, but he immediately becomes a major character and would probably be on the cover with Nano and the Professor regardless.