Gears! Gears! Gears!(R)

My 3-year-old figured out the gear connection in minutes, and now he loves turning the crank to watch everything spin. It's a nice way to introduce cause and effect without a screen.

The pieces snap together firmly enough that my almost-4-year-old can build a spinning tower solo, and watching the gears turn actually holds her attention past the usual toy shelf life. Great for sneaking in early problem-solving without her realizing it's "educational.

My 3-year-old is obsessed—the gears click together satisfyingly and he figured out how to make them spin on his own within minutes. It’s sturdy enough for his enthusiastic building and really does teach problem solving through play.