NATIONAL GEOGRAPHIC Magnetic Marble Run - 75-Piece STEM Building Set for Kids & Adults with Magnetic Track & Trick Pieces & Marbles for Building A Marble Maze, STEM Project (Amazon Exclusive)

Amazing . Kids was playing for hours. However you must have a big fridge or create a steel wall

Educational and doesn't take up space on the floor. Comes with a travel bag so you can easily take it to someone else's house. Pieces are sturdy and the magnets stick well. Instructions were easy to follow and encourage trial and error to get the pieces exactly in the right place or to make your own design.

It’s a lovely idea and overall reasonably good quality. You will need a lot of patience & perseverance to build some of those marble runs. Hence not sure this is suitable for most children under 10 or they need a lot of adult supervision and even the adults need a lot of patience! We used the side of our fridge and it works well. I would say magnets are strong enough. Overall, a lovely toy, but given that a lot of pieces are just plastic, I think it should be offered at a lower price

Good quality. The kids love it, only thing, there is nothing to actually catch the balls, so we have marbles bouncing on our tiled floor, a small inconvenience .Great fun

Really sturdy, lots of tips on how to use, inspires creativity and problem solving. Will be buying some of the add ons

Bought as a gift for two boys (8y,11y) and they played with it for hours … week later - still spending 1-2h a day changing the layouts/ improving the strategy. Highly recommended! We had kids age range 5y-14y visiting over Christmas and they all loved it

It is a toy, and I'm an engineer, probably I was expecting too much of it based on other reviews. The magnets are the weakness here, they are simply not strong enough. I had to supplement them with fridge magnets to enable reliable operation. The static elements that receive no shock loading are fine. However, when a marble drops onto an element, even a very short distance onto any track, or rotating, or other element, the element will move a small amount each time. without extra support. Fine, if this is to be used as a toy, but with this shortcoming, it is not possible to obtain repeatability over more than a few circuits due to the elements moving around. The fact that this comes with a lift, means that the elements need to remain where placed in order to provide cyclic operation. The marbles are also a weakness, none are spherical, just watch them as they roll! they are very poorly made and would be best, substituted for better ones. Overall, a great toy for a child, but not a gift for an engineer with expectations of repeatability.

Hours of fun for children and adults. You will need a decent amount of magnetic space on fridge or garage door but this is well worth purchasing