Seeds and small food particles can be put in the ball and by shaking the ball up and down they will fall into the tube, when the animal rotates the blue sleeve the seeds will be dispensed through the holes.
A shorter, stronger version that retracts faster.
A new alternative to the ZEL1 to combat chewing.
This bungee needs to be hung really high (approx 4 meters at the base from the ground) , this way the elephant can only reach it with it's trunk and not it's mouth.
Special thanks to Jodi Carrigan for this great picture of Ivan playing with an Aussie Dog toy. Heavy duty toy includes 10" treat ball swing and 8 ft. bungee cord. One of many great toys for large primates.