Perhaps it's too simple, but I like https://elenco.com/snapcircuits/

My kiddo has a couple of those, and I'm still in two minds about some of the choices that they provide in those kits.

It feels a little like "Follow these instructions exactly" without requiring understanding in a lot of cases. For example, the music IC doesn't have any of it's terminals labelled.

The same with the transistor; it doesn't seem to explain exactly why you'd need to use it, why you'd need a resistor on the base, etc. On that note, It's also possible to potentially damage stuff if you just try to experiment without understanding.

I feel like they could have made some of the parts a bit more flexible -- have current limiting resistors built into the LED & transistor units for example, provide point-to-point wires rather than rigid 1/2/3 unit connectors, etc etc.

Second this. My daughter is in 3rd grade and loves these.