I made a few of my Christmas gifts this year. A cousin and his two young sons got these toolbelts:
They are made from old denim jeans. I bought poly webbing (1″ I think) and buckles and adjusters to match, on eBay. The width is adjustable as each child grows. We put their names on them in iron-on vinyl, using our silhouette cutter, although that is not shown. It came out really cute though, and the silhouette cut the vinyl like a dream. If I were just making an adult belt, I might have gone with a 1.5 or 2″ width belt webbing for structure. But the ages of the children were 2 and 6, so I didn’t want to weight them down. These are the buckles and belting that I used. The toolbelts were derived from these by Debbie Shore.