So this is the VEX IQ product thread. And a metric ton of the “hexbug” products are VEX IQ compatible. These products have parts that you go “Wow, I’ve been looking for this”. Want to boggle roboteers? Dump the contents of some of the kits out and they go “I want that to be mine Mr Foster”
I’ll grant some is “zazzle” like the green translucent plastic “cat ears”. But most are “that makes my life easy”. The Advanced connector kit has a medley of connectors that were only in Hexbug kits. But lots of them are still inHexbug kits. This kit has a ton of odd length parts, sometimes you need an 8 but wow the 2x7 is just what I want.
The universe of parts is much bigger than you think, grab what you can. We are constrained by “legal parts” since we can’t cut/melt/weld/change parts. So these little things make easy happen.