Holy crap, that is amazing. I just introduced my kids to Voltron through the original series, they're 5 & 7. About the same age I was when I was captivated by the 5 space explorers. They would flip their lids for a Voltron helmet. This looks amazing, are you going to share the model.
I honestly just would be into the helmet, they love to make stuff and have done some fun stuff with simple cardboard boxes that I think is just so awesome that they have wild imaginations with simple things. My son came to me with a case from Girl Scout Cookies and said " if you cut a hole for my head and arms; take these to flaps and glue them on the back it'll be my Buzz Lightyear suit." (he's the 5 yr old) and proceeded to run around the lawn zooming on adventures. This would just blow their minds.