✅Metal Made - Our building toys set includes 340 parts and pieces, such as nuts, bolts, small screwdriver, and wrench, etc., Made of metal, which can stand rough play without worrying about easy collapse. A great careful crafting STEM building kit, worth paying a little more compared to full plastic versions. | ✅Bigger Size - This model train measures over 3.5” high, 16" long, and 2" wide, making it a beautiful display piece to show off with pride. I believe it will be bigger than you think. Really suitable for model train fans and DIY enthusiasts. | ✅Clear Instructions & Easy To Follow - We have prepared clear instructions for the children, showing the diagrams of each step, and everything is clearly marked. This teaches them to follow directions and ensures they won’t become overwhelmed or frustrated while they play. Wrenches and screwdrivers are also prepared for children to assemble parts easily. | ✅Support STEM Education For Children Aged 8-16 -The children think carefully and patiently assemble the train from the screws and gears. They are learning STEM skills during this about 5 hours assembling process! At STEM Master, we believe in empowering children to promote their creative learning and brain development. | ✅Great Collection - Our design concept is based on the Scottish Flying Scotsman steam locomotive that appeared in real history in 1928. As you can see, it is well imitated and the exquisite detail design retains the complicated structures of the original. For history lovers, it is a good collection and souvenir.