Would you (or the parent post) care to explain what's boring about them? Not everything can appeal to everyone, after all - that would seem to be an inherent flaw of the crate model.
I had a look at their catalogue... A lot of the Eureka crates seem to be sports-related (a table tennis robot and a golf putter for instance), and some of them haven't got any moving parts (the golf putter), which would've certainly made it more attractive to some - but personally, I don't _really_ have a problem with that. From what I could gather, they also explain the design choices behind each kit, which makes it all the more interesting. I'm a bit concerned about the durability, since neither their tiny printing press nor their pendulum clock look like they'll make it for longer than a week, but overall, it seems like a fun thing to do on a rainy afternoon.
The claw was great. The kaleidoscope was meh and the tree was not fun to build or play with. And given that they start you out with the great kit and then get progressively worse, we assumed the trend would continue. For 20 bucks a month you can buy lots of legos or other interactive toys. The kit items were also not especially durable. Legos last decades, Kiwi projects lasted 1-3 months before breaking.