I just realized that Grandma Marilyn had her own version of a junk journal/ art journal/ smashbook, decades before they became a trend! She had little notebooks similar to this, in which she doodled and glued magazine clippings with artsy stuff.
Origami is a little tricky for them because they don't have the dexterity, but with a little help they made origami bookmarks and christmas trees as an activity. They had fun with it. Folded Paper Heart Book Page Marker – DIY