I bought Magtrax for my 8 year old's birthday. We've just spent 90 minutes together building a route on the kids' wall, and it's been the best 90 minutes ever. Sarah squeals "YES!" and "OMG!" every time she tests the route and it works successfully. When the marble flies off as it's too steep, she groans, but immediately gets to work on making adjustments. The product itself is well-made - strong, simple, intuitive, and it's well within the capabilities of an 8 year old and her father to put together. Her sister,. 10, is sent to different walls to test and report back on some of the more complicated items, like the loop-the-loop, and then we integrate into the larger path.
Very impressed. 5 stars for sure. And I'd also like to mention the customer service... it was tight getting the gift to my daughter on time, and Bryan upgraded the shipping at his cost to make sure it arrived, plus put a personal note from the inventor to my daughter.
We're delighted, and we'd love it if this review brought this product to more 8 year-olds; it's her favorite gift this year.