Search query: marble run without marbles

Product: Quercetti - Skyrail Evolution - 174 Piece Marble Roller Coaster Construction Set for Kids Ages 7 Years + BUILD AND PLAY WITH THE ULTIMATE MARBLE RUN ROLLER COASTER: Skyrail Evolution includes new high-performance features for non-stop marble racing action
CREATE UNIQUE TRACKS WITH 174 PIECES AND NEARLY 20 FEET OF TRACK: the hanging track and support pieces can be built in many different ways, follow the instructions for a design or create unique courses
SPECIAL HIGH-PERFORMANCE FEATURES: "marble launch rocket" helps marbles reach super speeds while the "rotating atomic hammer" gives extra power to the balls as they fly through the loop-de-loop
EXPERIENCE THE FUN OF PHYSICS: bring children closer to the world of physics with a fast-paced marble run that makes learning fun
INTELLIGENT TOYS TO PROMOTE STEM / STEAM LEARNING: Quercetti toys are designed for children ages 3 to 12 to encourage reasoning, stimulate creativity and hone physical skills. Quercetti toys span a wide range of categories and stages, from early skill builders to craft activities, pure educational products to advanced construction sets Quercetti Multi-coloured

Product: Kids Building Block Set Marble Run Classic STEM Building Toys 179 Pcs Castle Building Bricks Race Track Boys Girls Construction Roller Coaster with 6 Balls and Slide for Toddler Gift Age 3+ EP EXERCISE N PLAY STEM Marble Run Castle Building Set - Explore the new world of kid's brain and inner, Inspire their imagination and creativity, develop their patience and hands-on ability, delivers an enjoyable build-and-play experience. Total 179 pieces stem building blocks in a big box, easy to carry. Including 6 marble balls, building baseplate and stickers.
The stem castle building set is compatible with other name brand blocks for creative building. Kids can use their imagination to blend other blocks and create more extraordinary styles.
With the step-by-step instruction, it will keep your kids busy for hours to assemble the whole marble run set, they can also work with friends or parents to enjoy the building process.
Exercise N Play STEM building kit delivers an enjoyable build-and-play experience. The detailed buildings stimulate imaginative, open-ended role play for kids of all ages.
This roller coaster building set sparks imagination, offers endless fun, makes an impressive Christmas holiday, birthday or any-other-day gift for boys and girls aged 3 years and up. EP EXERCISE N PLAY