PT - JOURNAL ARTICLE AU - Harborne, Katrina AU - Williams, Helen TI - Puzzling pyramids AID - 10.1136/archdischild-2017-313952 DP - 2018 Aug 01 TA - Archives of disease in childhood - Education & practice edition PG - 211--212 VI - 103 IP - 4 4099 - http://ep.bmj.com/content/103/4/211.short 4100 - http://ep.bmj.com/content/103/4/211.full SO - Arch Dis Child Educ Pract Ed2018 Aug 01; 103