The track add on box is OK, but insufficient for doing much more than adding onto existing sets. If anyone wants to create even a simple oval, multiple sets of this type would have to be purchased to do this, often to the chagrin of the parent, etc. There should be options to purchase just the tracks required to do this, or at least instructions on what would be required, rather than leave it up to guesswork. When my kids were small, I had an elaborate train set up (fixed to a base), so they could create anything they wanted. It was great for the time, but times have changed. I purchased the Hogwarts Express train set for my granddaughter, which in fact came with zero tracks. No problem, I bought a couple sets of tracks so she could enjoy a track set up. However, it was quickly obvious that the few pieces in the sets were still sadly insufficient to complete a simple oval. It is OK to show with illustrations how the box of tracks can extend other sets, but is no help to the purchaser what it would take to do anything else. Having some sort of option to get just the pieces a user needs to create and complete a simple layout would alleviate buying frustrations and help reduce negative reviews.