I think I was about 12 when I got these, and I remember that the learning curve between them was pretty steep - I was building all sorts of custom circuits with Snap, but had maxed out the capabilities of such basic parts pretty quickly. I never did figure out how to make anything other than the step-by-step projects with the breadboard kit. Although the ICs on Snap are kind of laughable, I could at least figure out what they did (also I seem to remember every one of them just played a sound), but the Radio shack kit never really explained why anything worked the way it did or what the applications were outside of its recipes, so eventually it just went on the shelf and was forgotten. That would be one trap to avoid from my experience.
[1]: https://shop.elenco.com/consumers/snap-circuits-jr-100-exper...
[2]: https://www.amazon.com/RadioShack-28-280-Electronics-Learnin...