Abstract: The kit of parts for forming the device includes a first base member (12) having securing means (20) for securing it to the upper surface (24) of a baby nappy changing mat (10) at a first location (26) and engagement means (28) formed on its upper surface (24) for releasably engaging at least two upper arm restraint members (16) selectably in a plurality of laterally disposed positions. At least two upper arm restraint members (16) are provided, each in the form of a loop of adjustable circumference and each having, on its outer surface, engagement means (32) for releasably engaging the upper arm restraint member (16) with the first base member (12). A second base member (14) has securing means (42) for securing it to the upper surface (24) of a changing mat (10) at a second location (46) spaced from the first location (26) and engagement means (48) formed on its upper surface (50) for releasably engaging a torso restraint member (18).