Distinctive Bookmarks your kids can make
Any scrap of paper tucked between two pages will do as a bookmark, but origami bookmarks can be fun to make, and look a little different as well. These origami bookmarks can be slipped onto the corner of a page.
Origami Templates
Heart Bookmark
Not quite Origami, but also fun:
Corner Biter
I've seen "thematic" versions as well: vampire, pumpkin, elf, cupid, etc.
Envelope Corner
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