Snap Circuits Jr. SC-100 Electronics Exploration Kit, Kids Building Projects Kits, Stem Engineering Toys for Kids 8+ Price:  $20.99 (as of 25/12/2019 02:38 PST- Details)

With this building toy, young engineers can assemble over 100 different electronic circuit projects with just 30+ electronic parts.
Kids can construct working models of a photo sensor, a flashing light, an Adjustable-Volume siren and much more!
This stem kit comes with a clear, easy to understand illustrated instruction manual