The Yamba Wave-Up 3 Adapter Set adds even more variety and excitement to any wooden railway track. With its cleverly designed ramps and curved elements, you can create thrilling ascents and descents that make every train ride a special experience. All parts are compatible with common wooden railway tracks and building blocks, making the set a perfect addition to existing play worlds. Contents of the Wave-Up 3 Adapter Set: 31 Adapter Links, 4 Adapter Bars, 2 Crossings, 3 Wave Wooden Tracks.