NSI/Smithsonian Jet Works STEM Kit $18.25 (regularly $40) at Amazon

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Amazon has the NSI/Smithsonian Jet Works STEM kit on sale for $18.25 (regularly $39.99).

Build a Working Model of a Jet Engine Learn the science behind why a jet engine works by assembling this replica plastic model. Once built you will control the thrust and turbine speed. Battery operated moving parts and lights help bring the simulation to life.