Search	Key Word (KW) or Subject Heading (SH)	Terms	Results
#1	KW	Play OR preten* OR game* OR toy OR recreation (all fields)	97,451
#2	SH	Recreation OR toys OR dramatic play OR games	17,256
#3	KW	Train OR trains OR train set OR train track OR train play OR Thomas the tank engine OR Thomas and friends OR Hornby (all fields)	10,099
#4		1 OR 2	97,451
#5		4 AND 3	658
Note. For key words related to ‘Train’, the term ‘train*’ was not used as it resulted in many irrele-vant articles, largely related to the term ‘training’. Subject headings in ERIC were different to those used in PsycInfo due to database differences, and an analogous term for ‘railroad trains’ did not exist. Additionally, there is no functionality to set a limit to childhood given the focus of the database on education. * reflects truncation of the search term.