What types of puzzles are the ones that you give to the monkeys

Question: What types of puzzles are the ones that you give to the monkeys
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Asked by needforspeed to Lewis on 9 Mar 2014. This question was also asked by .
- Lewis Dean answered on 9 Mar 2014:
  
  We give them puzzles where they have to undo doors or slide things out of the way to get to some food. Sometimes they might have to use a stick to poke things and get the food. They will work really hard to get a yummy bit of food (like a grape).

Question: What types of puzzles are the ones that you give to the monkeys