What observation is not typically associated with confirming the presence of peripheral edema?

The presence of peripheral edema is typically confirmed through direct observations and assessments that indicate changes in fluid distribution in the body. Assisting the child with exercises is not a method used to confirm peripheral edema, as this action does not provide direct insight into fluid accumulation or swelling in the tissues.

In contrast, palpating the dorsum of the feet can help identify swelling by noticing if there is a pitting edema, where an indentation remains after pressure is released. Observing for periorbital swelling specifically looks for edema around the eyes, which is a common indication of fluid retention. Measuring the child's weight is a quantitative method that can reveal changes in fluid status; sudden weight gain may indicate fluid overload or edema. Therefore, assisting with exercises does not yield specific observations related to the presence of peripheral edema, making it the correct answer in this context.