About the educational value one must, I think, do not even waste words, you learn a lot about drive and motion technology in practical and playful use, something better can you offer in this respect hardly. Stay the price and the fact that the battery box is crying out for 6 AA batteries and therefore naturally once somehow must be relatively bulky item to be scheduled in the models - in the official Technic stuff usually no problem, but must at own creative work that Ding once somehow accommodated and especially the weight to be taken into account. For quite powerful engine, however, this is not a problem, it does its job reliably and in conjunction with a sensible gear moving all lego possible unerringly from A to B. as long as there are no kilo Death Stars on Wheels. Short the set is therefore a thoroughly sensible addition to the domestic Lego collection and only the bulky battery box and the price spoil the overall picture somewhat, resulting 1 star deduction in the overall results. Lego Maniacs can but, if you ignore, because gameplay has halted previously rare a purse :)