About the Hyper / Excited Inner Child
Human thinking, speech, and behavior ranges dynamically between low energy to very high. Some people have an Inner Child which is easily excitable or is chronically "hyper." This subself can affect kids ("AD/HD") and adults
If the excited behavior is moderate, appropriate, and situational, that's usually no problem. It becomes a problem if the physical and mental excitement qualifies as "manic" or "hyper."
Over-excitement and manic excitement may be caused by hormonal imbalances or psychological wounding from early-childhood trauma. Medication is appropriate for the former, and inner-family systems (IFS) therapy ("parts work") can help regulate the latter.