Niko alternates between being THE MOST CAUTIOUS CHILD IN ALL OF EXISTENCE and being a real daredevil who tosses himself about with wild abandon. It's all about his own comfort level. Swings, for instance, terrify him. But he will climb to the top of a ten foot tall slide and sit up there, looking around, before sliding down. It makes it hard for me as a parent to judge how he's going to react in some situations, and it also affects his skill development (he will sit on developing skills and not bust them out until he's mastered them, because again, cautious).