Blue Peter with adverts, basically...
The set was basic and sparse, there were models to make (and grave warnings not to use those scissors, get an adult to do it properly), the charity appeals and even the badges!
ITV knew Blue Peter had the right idea and Magpie was in the main a shameless copy - that didn't make it any less watchable though (Jenny Hanley - last seen having a bucket of cold tea thrown over her to warn of leaving cups of tea in reach of tiny hands -helped in that regard!)
The presenters of Magpie were Mick, Doug and Susan Stranks (of Itsy and Bitsy fame). Jenny Hanley joined after Susan left.