Yep! If you look at the toy closely (the crane part) youwill notice that along the end of each section is a hole. the string is placed through them as guides. it then uses the first pully wheel at the end to reduce friction and snapping from going over a sharp or blunted edge (does not fit around the wheel, it just dangles over it as a guide) The string then wraps through/arounda bottom wheel moving up to another then back down, and repeat until the string comes back up to finally rest/knotted to an underside loop on the end beam of the crane.
the more loops there are from the crane end to the pully hook below will cause the end weight result to be lifted, multiplied. In short, the more pully wheels the more weight can be lifted at one time. but you will also have to pull that much more rope in order to get it up. each loop = X amount more times in distance you have to pull the rope
hope that clears it up for ya
and no im not being a smart ass, I just grew up around heavy machinery, one being a fucking MONSTER of a crane.