Answer:
Egocentrism
Step-by-step explanation:
Egocentrism refers to an individual's inability to distinguish his/her personal behaviors and thought with other people's.
For most people, this ability will be fully developed by the age of 7.
When a groups of 5 years old are made to conduct a team based exercise like this, their performance will be heavily limited since they cannot understand the intention / point of view of other team members.