Are big 100+ piece art sets actually worth it, or is it filler?

It's genuinely mixed. Verified-purchase reviewers tend to be enthusiastic about the value, but specialist art communities consistently warn that bulk kits often contain low-quality markers, pencils, and watercolors. For a kid who's exploring and not yet a serious young artist, a branded set from Crayola or a well-reviewed multi-pack is usually fine. For a kid who's outgrown beginner supplies, individual quality supplies tend to deliver more.