I am very familiar with your regular basic science kits and exploration sets such as (my fav!) the Snap Circuits sets and experiment sets, but the older my boys are getting the less interested they are in your typical science kit gifts.
The below engineer and science kits are beyond cool and awesome for your older kids and engineer want-to-be’s!
Build your own working reproduction of a 19th century pumping engine. (no tools or glue required!)
Build your own working internal combustion engine! Endorsed by Haynes World’s No. 1 publisher of Car Repair Manuals.
Build your own working robotic arm! NO soldering required!
Build your own working all terrain vehicle! NO soldering required!