

⚙️ Ignite your inner engineer—build, move, and amaze with every chain reaction!
Lego Chain Reactions is a STEM-focused building set featuring 33 multicolor Lego pieces designed to create dynamic moving machines. Suitable for ages 8-12, it encourages hands-on learning through customizable chain reactions without the need for batteries or remote controls. Highly rated and perfect for fostering creativity, problem-solving, and engineering skills.






| ASIN | 0545703301 |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #753 in Toy Building Sets |
| Color | Multicolor |
| Customer Reviews | 4.4 4.4 out of 5 stars (22,909) |
| Date First Available | 30 May 2014 |
| Educational Objective(s) | STEM |
| Item model number | 9780545703307 |
| Language | English |
| Manufacturer recommended age | 8 - 12 years |
| Material Type(s) | Plastic |
| Number of Game Players | 1 |
| Number of Puzzle Pieces | 1 |
| Product Dimensions | 25.49 x 4.45 x 25.67 cm; 530 g |
| Release date | 1 January 2015 |
| Remote Control Included? | No |
| tech_spec_battery_description_toys | No batteries required |
V**N
It will keep your child busy for hours
My 5 year old loves creating chain reactions. This was a wonderful Christmas gift. Even though an adult supervision is required, you must allow the kids to read the book and create their own chain reactions. I was surprised to see my 5 year old go step by step and build the machines. Of course, you need extra Lego's This is just an addition.
D**S
Good
Very few pieces. But this works with most other Lego pieces and good work for the brain to try create, record different types of reactions.
A**A
Promotes creativity and learning
Easy to follow instructions and a variety of moving machines to work through. Would suit 9-11 years.
S**O
true product
kids love
M**7
Good
Good
M**N
White bricks were not included in the box.
Today I got lego chain reaction toy and it has Few pieces in the box. Unlike the pictures they are showing here it doesn’t have white bricks. My son ended up with making only small structures.
R**A
Imagination is the limit
Original product at good price.
B**I
Very bad!!!!
Box came broken as it is a second hand!!!!!
L**.
I got the LEGO Chain Reactions Kit for my boyfriend’s 11-year-old, and it was an instant hit. He’s already a big LEGO fan, but this took his building skills to a whole new level. The kit shows how to turn regular bricks into moving machines that actually do things, like kick a ball or send a message. The instructions are clear and super engaging, with just the right balance of challenge and fun. It also teaches some cool STEM concepts without feeling like homework. He got really into experimenting with the designs and even started inventing his own. If you’ve got a kid who loves building and figuring out how stuff works, this is a perfect choice. It’s creativity, engineering, and fun all in one box. Highly recommend!
M**K
Nice to add to the growing Lego collection. The balls are useful to make other contraptions too
A**A
my kid loved it!
M**D
Not much bricks.
C**T
Purchased for my 10 year old Lego obsessed nephew - he loved it! Gave him a new challenge rather than always building kits.
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