that was back in feburary aye the uni day,
i done the enginerring class it was pretty good, had to transfer styerform ball from one bucket to another 60 cm away with out moving the buckets and only had a little fan two cardboard folders, a gabbage bag, and some tape
Just bend the cardboard and place the tap around it then let it act as a shovel to shovel the sand into the plastic bag and then transfer it into the bucket.
also the cardboard is about 50 cm long. And to aim is to get as many as poosible into the other bucket in 30 seconds.
Got to use the fan as a sucking device and suck the balls from the one bucket by putting the two folders inside themselves and letting them fall into the other bucket