Hello! I am a civil engineering student and have been tasked with creating an enrichment object for elephants at the national zoo in DC. I don't know much about pulleys, and am wondering if there are some mechanical engineers out there who could give me some hints on how to achieve this! My idea is for a system of one (or more) pulleys. On one end of the rope would be a bucket and on the other, a large heavy object (such as log). The goal is this: once an elephant lifts the log the bucket will be lowered so that another elephant could grab the goodies inside the bucket. I need a system that will allow the bucket to be lowered at controlled rate, so that it will be safe for the elephants/zoo keepers. I also need to prevent the bucket from getting too high and tangled in the system. Is this at all possible, and what are your ideas? Thanks SO much!!