In the fifth grade in N.E. Ohio in 1954, one day a school mate brought to class a forage cap, a tunic, and a Springfield rifle that had belonged to an Ohio Civil war ancestor of his. I was so impressed (I had started collecting antique firearms the year before) that I can still see him standing there with his "show and tell" and I never forgot his name though he moved away that summer. Another kid had a pair of CW muskets from his family and later, a family let me spend hours in their downstairs family room going through the storage trunks of a field grade Union officer who was their ancestor. They had a complete set of 10 volumes of the photographic history of the CW.
I examined his frock coat, pants, overcoat, his officer's sabre and sash, and a couple kepis. One was dark blue but there was one that was artillery red. I had the impression that the red one may have been a captured Confederate kepi as I believe the Union officer had been an infantry officer but that was a long time ago, I was only ten and there were no reference books on uniforms, caps, etc. He was not a Zouave.
I sought out an elderly couple (relatives) who could connect me with information on a couple OVI ancestors hoping they might turn up one of those forage caps for me but all they could find was paperwork -- a tear stained letter from a CO telling the parents of one g,g, uncle that their son had died and discharge papers of another g,g, uncle along with his hand written parole when he had been captured after the Battle of Cedar Mountain.
At ten I bought a CW US socket bayonet for $2 in an antique store and a documented Conf. ctg. box that had been captured at the Battle of Rich Mountain for $1.50 from the same antique store in Mentor, Ohio. That was 63 years ago.