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)

This kept my 12 and 9 year old quite occupied with a good dose of frustration while they figured it out. There’s a plan in the box to follow too and it didn’t scratch my fridge freezer either. Great purchase!

Got this for my grandson at Christmas, he and his dad loved this, making runs down the fridge freezer doors.

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

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.

My son is 9 years old and we bought him this for Christmas. This has to be the best present I bought for anyone. We have all had so much fun with it, the creativity to work out new runs learning to do small adjustments to make it work, it's been brilliant. We struggled getting the hang of the Catapult but that's just us, only downside is not being able to buy add ons. I wish I'd bought the bigger set but well will just have to get that next. Highly recommend this. Also we have used an old wipeboard rather than the fridge which has been perfect especially as we can move it around

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

Looks amazing - birthday gift not get given so will report later

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.