

🎡 Build the future of fun — where engineering meets epic play!
The LEGO City Robot World Roller Coaster Building Set (60421) is a 986-piece, futuristic amusement park toy designed for kids 8 and up. Featuring a fully functional 3-car roller coaster, a posable mech suit with minifigure seat, and 8 unique minifigures with accessories, this set combines STEM-inspired building with immersive role-play. Measuring over 21 inches wide and 10 inches high, it offers a multi-level arcade environment complete with video game consoles and a slushy bar. Supported by both printed and 3D app instructions, it’s a standout gift that sparks creativity, engineering skills, and hours of imaginative fun.









| ASIN | B0CV2G74KG |
| Best Sellers Rank | #11,164 in Toys & Games ( See Top 100 in Toys & Games ) #465 in Toy Building Sets |
| Customer Reviews | 4.9 4.9 out of 5 stars (497) |
| Item Weight | 4.14 pounds |
| Item model number | 6470808 |
| Manufacturer | LEGO |
| Manufacturer recommended age | 8 years and up |
| Product Dimensions | 21.26 x 11.1 x 3.58 inches |
| Release date | July 31, 2024 |
A**R
Incredible LEGO Set With Amazing Detail and Tons of Play Value!
This LEGO roller coaster set is absolutely fantastic — from the moment you open the box, you can tell it’s something special. The design, colors, and futuristic robot theme make it one of the most eye-catching sets out there. Kids who love amusement parks, robots, or STEM-style builds will be obsessed with it. 🔹 Awesome Design & Super Fun Theme The combination of a twisting roller coaster track with a full robot-themed gaming park is unbelievably fun. There are tons of details: an arcade area, a DJ booth, a slushy bar, and even a giant mech suit that moves. It looks incredible displayed and is just as fun to play with once it’s built. 🔹 Big, Satisfying Build With Great Instructions With a high piece count and a multi-level design, this set keeps kids engaged for hours. The instructions are clear and easy to follow, and the final build feels sturdy and impressive. The curved neon-green track pieces stand out and make the coaster look fast and futuristic. 🔹 Smooth Roller Coaster Function & Great Figures The coaster itself rolls well and has several fun twists and turns. The included minifigures are colorful and unique, adding a lot of character and play possibilities. Kids can send the coaster around, pose the mech, or act out scenes in the arcade — there’s no shortage of things to do. 🔹 A Showstopper Gift This set looks huge and exciting when assembled, making it an amazing birthday or holiday gift. It’s the type of LEGO build that kids proudly keep displayed long after finishing it. ✅ Pros: Fantastic theme with tons of detail Roller coaster works smoothly Large, impressive multi-level build Includes great minifigures and accessories Perfect for kids who love engineering-style sets ❌ Cons: None — it’s a standout LEGO set in every way Overall: This is a top-tier LEGO set that delivers creativity, playability, and wow-factor all at once. Fun to build, fun to play with, and totally worth the 5 stars.
R**!
Great set, keeps kids busy
This set is so cool! I have multiple kids that love legos and this one definitely stands out. My son loves it! It just gives a different element that most other Lego sets don’t have. I got a great deal on it during the Black Friday sale and I’m so glad I purchased it. Keeps kids busy for hours.
J**J
It’s all in the details
This is such a quality set and so much fun to build and play with. We were impressed with the details.
A**X
Meant to be played with :)
Bought this on sale. Will worth the price! Very sturdy and a lot of fun to put together with my 7 year old. He played with it for several days before it ended on the shelf to be admired by everyone. Directions were easy to follow.
M**E
Grandsons, 8 and 10 Loved this set
Great Lego building set. Both my Grandsons loved constructing it. Definitely worth the purchase price.
K**K
Cool
My daughter loved it, she is 12 and put it together very quickly and both of my kids love the moving parts.
J**R
Fun Set
Pretty nice set, my son loves it and it is once of the nicer sets in the price range. Standard Lego quality.
T**Y
Really cool Lego roller coaster
Got this for my 15 year old and so far it’s taken him a good bit of time to do it. I am excited to see the finished result and get the roller coaster going! If your kid enjoys Legos and wants a bit more of a challenge, this is the one!
E**N
Super cool set to build, my son is 12 and he bought this over the summer for something to keep him busy and off electronics he built by himself with now difficulty. It's one of his favorite builds.
M**I
A montanha russa é linda e cheia de detalhes
A**A
Al ser un producto Lego, ya habla por si solo en cuanto a garantía, es muy divertido y fácil de armar si tienes un pequeño que le guste esta actividad sin duda lo va a disfrutar.
J**.
Para la oferta a la que lo conseguí estuvo muy bien, la calidad es muy buena. Y de verdad esta increíble.
F**O
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