Mobilo Flow Set

48 Piece Set That Includes A Flow-Adjustable Funnel And 2 Spinning Paddle Wheels, Perfect For Indoor And Outdoor Experiments With Sand And Water. Which Direction Do The Wheels Turn? Why Do They Go Fast Or Slow? How Does The Sand/Water Flow? What Happens When The Flow On The Funnel Is Adjusted? Includes An Instruction Guide And A Plastic Storage Container That Can Double As A Sand Bucket. 3Yrs+.