crank toy drive unit coupling 30 is rotatable about the axis of rotation 28 of rotary output element 26 modular crank toy 10 also includes multiple junction units 40 to aid in the transmission of rotary motion from one element to another in the assembled modular crank toy details of a particular cube shaped junction unit are shown in fig3 and 40 as will be seen from fig1 3 however junction units 40 may take many different forms in the assembled unit a sampling of individual shapes for junction units 40 are shown in fig1 28 each junction unit 40 includes a junction unit body 41 which houses the various components of each junction unit 40 as with the other visible components of modular crank toy 10 junction unit body 41 is preferably constructed of a brightly colored plastic housed within junction unit body 41 are a set of rotary transfer elements which in the particular embodiments of the invention shown and described herein take the form of bevel gears 42 bevel gears 42 are in intermeshing relationship with each other as best seen in fig4 and rotate about multiple axes of rotation 43 preferably at least one of the axes of rotation 43 will be at right angles to at least one other such axis 43 it will be seen that rotation of one bevel gear 42 effects rotation of the other bevel gears 42 within each junction unit 40 each rotary transfer element 42 terminates in a rotatable junction unit coupling 44 i e coupling 44 is affixed to each transfer element or bevel gear 42 and may be integral therewith each junction unit coupling 44 rotates about the.