I love this kit, do you remember what a transistor, tresistor, capacitor do? Not sure? Well no worries, discover it again with your kids, teach them a little of what is behind the slim oblong glass fronted phone or tablet, how motors and circuits, sensors etc... work.
The kids love it to, with lots of layouts for them to follow, and so easy to click together and take back apart.
Simple and brilliant,
And for grownups I recommend you get yourself an Arduino Uno kit as well to do more advanced stuff and impress the kids even more.