Should reading books for young children be set in serif or sanserif type?
To find out whether children found serif or sanserif typefaces easy or difficult to read we took into account:
Our findings suggested that there is little significant difference in children's reading performance when Century (a seriffed typeface) is compared with Gill (a sans serif typeface).
You can find out about this work in: Walker, S. and Reynolds, L. 'Serifs, sans serifs and infant characters in children's reading books', Information Design Journal, vol I.II, no. 2/3 (2002/3)
Century Schoolbook: a detail from one of the pages used in testing
Gill Sans: a detail from one of the pages used in testing