Volumes 1-9 issued between 1891 and 1899 then from 1900 as New Series 1.
[John Ritchie continued as editor until his home call in March 1930 after which J. Charlton Steen, another well known gospel preacher and teacher of the Scriptures who had assisted Mr Ritchie for 4 years, assumed the editorship. He was an able Bible teacher but had a short tenure as editor as he was called home in September 1931. The third editor was another gifted Bible teacher whose writings are still read. William Hoste was editor until 1938. Mr Hoste studied at Cambridge University under Handley Moule. His studies of the Word of God convinced him that such teachings as baptismal regeneration apostolic succession and episcopacy were not found in the Word of God. As a result he was baptised by immersion and received into assembly fellowship. He laboured in the UK and Europe. After the death of William Hoste, Andrew Borland of Irvine, Scotland, served as editor until 1974. He taught English at Kilwinning Academy, a post that he held from his early days until his retirement. He was the author of a number of books and in great demand as a Bible teacher in Scotland and beyond. From 1974 until 1998 the editorship carried on by a committee ... The present editor is John Grant.] See here
Medium format children's magazine; I do not know how long it continued.
At least 16 volumes were published. Apparently later renamed "The Christian Worker" (ND - Open Brethren in Scotland).
Continuation of The Sunday School Workers' Magazine
Mentioned by Neil Dickson in "Open Brethren in Scotland" p172 .. never seen a copy.
I have volume 8, 1895 - not scanned yet.