Creativity and problem-solving

Studies have shown that they have advanced problem-solving skills and can get creative with using and making tools even if they haven't seen them before. Apperently they actually enjoy making tools.

They have also been observed leaving "gifts" to people. They have learnt that if they can exchange "gifts" in form of random trinkets, twigs or small shiny things for water or snacks such as seeds or nuts. This process is similar to how we train dogs with treats.