K'Nex Motorized Madness Ball Machine

Consisting of over 2000 pieces (OK...2,004 to be exact), the K'Nex Motorized Madness Ball Machine is a towering ball run contraption for the ambitious builder. A motorized ball lift continuously carries the 5 balls to the top of the tower, where they are dropped to find their way down 3 different ball runs.

From the product description:

The downward spiral sends balls down a dizzying ride to the bottom. The hammer drop transports the balls off the track and onto 2 swiveling elevators, and the funnel drop sends balls on an express ride straight to the bottom.

Appropriate for builders of 9 years and over, Amazon claims you can still order this with their Standard Shipping to get it by December 24th.

Here's the link to the K'Nex Motorized Madness Ball Machine.

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