It's probably not going to last you more than a week in terms of learning electronics, but it makes playing with simple circuits super easy. (news.ycombinator.com)
Now, even back in 2000, a digital clock was a very simple circuit; literally child's play. (inc.com)
Any electronic engineer learns by building small circuits first, so neuroscientists have long wanted to build simple circuits of neurons. (sciencemag.org)