This was one of my Christmas presents this year. The track fits together neatly, using the holes in the bottom board as a standard distance “tool”, and there are various components that let the track do different things, like there are direction changers (with the green “arrow” shapes) or the white bridge-shaped piece near the bottom on the left, which is actually a magnet that will push the top ball of a collection at some speed. We love building this, like lego, with one or two people as “Finders” and someone as the “director” or “conductor” telling people where to put the pieces.