therefore as member 26 is rotated upwardly towards member 24 member 22 is no longer supported outwardly therefore member 22 is permitted to fold toward member 24 causing member 50 e to rotate downwardly also allowing member 50 d to slide downwardly and rotate downwardly simultaneously member 50 f rotates downwardly and member 50 c slides and rotates downwardly at completion the entire step stool 10 lies flat against member 24 now this description has been given as if the step stool 10 were only two dimensional the actual step stool 10 is of course three dimensional but the rotating and sliding parts merely extend along the third axes such that the object can be modeled in two dimensions as an alternative to conventional fastening means each riser tread member 50 may be constructed with integral locking tabs not shown having latch surfaces which resiliently slide through matching slots also not shown in the side support members 20 in such a manner that the treads 50 and side support members 20 can be connected together without the use of tools in this manner the step stool 10 can be readily manufactured and shipped in a flat knocked down configuration to save on shipping and inventory costs and the step stool 10 can be readily assembled by the user upon purchase the step stool 10 of the present invention can be fabricated from a wide variety of materials by a number of methods and in a number of forms or sizes dependent upon the size of the user and the nature of the use in one preferred form of my step stool 10 the side plates and treads as depicted in fig1 through 3 5.