Although the lack of communication became a considerable problem, Eric did start having fun. But by the Source these kids can get out of control, let's try something new shall we? Let's hear Eric narrate it out from his own personal point of view.
"Hmmm... how do I tell this kid to stop howling?" Obviously not the best way to continue the bond, considering that they started interacting a few minutes ago.
"These kids are cute, but they are just too loud." He thought to himself as he tried to show the kid through gestures to not yell. With sign language not invented yet, he can't make a proper understandable gesture, especially to a child.
He decided to wiggle his finger, hoping that the child will understand. But no, the boy tried to bite his finger. Considering the average Calidum Lutum strength it might not be too different from a bite coming by a new adult cave bear.