Hi. First of all, what age is it in Naruto? On one hand, they seem to be wearing modern enough clothing, but on the other hand you never see things such as cars or guns.
For that matter, are there any ninjas in training that use technology to their advantage? Not like an arrow made from their jutsu, but actually thought to take something that costs no jutsu, and use it to defeat the opponents? So, yeah, that's pretty much it.