Story!
The scienist at the zoo will tell you that if you acn find omething the lions like she'll give you the machine.
So go talk with father lion at the circus. He'll give you meatballs.
Go back to the zoo and give the meatballs to the lion cubs, so now we know their favourite food.
You an go talk to the scientist again, but we still need the recipe, so go back to the father lion and talk to him again to get the recipe.
Give the recipe to the scientist and she'll finally give you the machine.