Search query: marble run without marbles

Product: Quercetti Transparent Marble Run - 45 Piece Basic Building Set - Classic Construction Toy Perfect for Beginners Ages 4 and Up (Made in Italy) A great starter set for children aged 4 to 8 years. The simplistic design allows for open ended building in unique kid-powered configurations.
This 45 piece set includes 2 spinning wheels and starting gates for rapid marble release. It lacks advanced pieces of the larger sets allowing kids to focus on the basics without frustration.
Fully compatible with other Quercetti Marble run play sets (sold separately). The possibilites for future expansion are endless!
Kids will enjoy building without realizing they're learning scientific principles like gravity, momentum and torque. Quercetti has been proudly manufacturing educational toys in Italy for 65 years.
Contents include: 14 pillars/tubes/uprights, 4 base elements, 2 swirls,2 starting gates, 1 starting gate container, 10 marbles and 10 straight tracks. Quercetti

Product: Marble Genius Marble Run Super Set - 150 Complete Pieces + Free Instruction App & Full Color Instruction Manual This vibrant Marble Run comes with 85 complete translucent pieces that allow you to see the marble action from top to bottom as the 65 glass marbles make their way down the set. The solid plastic pieces allow for easy use by young kids and adults. Marble Runs allow for almost infinite possibilities for assembly from the very simple to the extremely complex. This Marble Run Super Set is the perfect way to allow you to start discovering the endless possibilities and excitement that comes from designing a run and watching the marbles make their way down the set. 85 complete see-through Marble Run pieces in 19 distinct styles allow you to see all the action (we don't count pieces like everyone else - these are actual complete pieces and not parts that have to be added together! See comparison in Product Description.)
Solid plastic pieces that stick together and are easy for kids to play with
8 solid bases including 3 large bases to ensure maximum stability (large base designs vary slightly per included pieces image)
Free Marble Genius Instruction App with purchase that includes 9 step-by-step guides, fun challenges, and regularly updated content (iOS or Android)
Compatible with Marbulous Marble Run Toys including our Marble Genius Marble Run Starter Set (60 pc.), Extreme Set (125 pc.), Booster Set (20 pc.), & 9 Accessory Sets. Standard Toy Size Marbles (5/8 inch or smaller) work with this set (65 Glass Marbles Included) Marble Genius