Monsters aren’t just for Halloween? Grab that big box of LEGO® and get ready for a whole new set of LEGO challenges today with an alien or monster theme. You decide! These LEGO monster challenge cards are a great way to get kids fired to build with the bricks they already have at home or in the classroom. Follow the prompts to complete the monster build using the LEGO you already have. Maybe the kiddos will even invent their own LEGO challenges!


LEGO is one of the most excellent and versatile play materials out there. Ever since my son connected his first bricks, he was in love. Usually, we enjoy tons of cool science experiments together, so here we have mixed science and STEM with LEGO® building ideas.

Why Use LEGO for Hands-On Learning and STEM?

LEGO bricks are perfect for hands-on learning and STEM (Science, Technology, Engineering, and Mathematics) education for kids for several reasons. First and foremost, they encourage creativity and problem-solving. By providing a medium for kids to build and experiment, LEGO bricks enable kids to explore their imaginations and find innovative solutions to various challenges.

LEGO sets often come with detailed instructions, allowing children to follow step-by-step guides to create complex structures. This helps them develop their ability to read and understand technical documents, enhancing their spatial awareness and logical thinking.

These LEGO task cards do include instructions for kids to follow!

Moreover, LEGO can teach various STEM concepts, such as physics, geometry, and mathematics. Kids can learn about balance, friction, and gravity while constructing and testing their creations. They can also use LEGO to study concepts like symmetry and patterns, making learning more engaging and hands-on.

The LEGO task cards below are fantastic for exploring math, symmetry, and patterns!

Collaboration is another key advantage of LEGO bricks. Kids can work together to solve problems, share ideas, and build projects as a team, promoting important social and communication skills.

Watch the video example:


The benefits of LEGO are numerous. From hours of free play to more complicated STEM projects, LEGO® building has been encouraging learning through exploration for decades. Our LEGO® activities cover so many areas of learning that are great for preschoolers through to the early teen years.


If you want an easy, playful learning activity to share with your kiddos, you will love this monster theme-building activity. All you need to do is download our free printable LEGO monster challenges below, find some basic bricks, and get started!

These LEGO challenge ideas go a step beyond the basic challenge cards because they offer a special task to complete!

Are they monsters or aliens? They can be whatever the kids want them to be! If they are aliens, grab the LEGO space challenges, too.

Why not pair these monster challenges with another fun monster activity?


These LEGO challenge cards each feature a monster theme build and a specific building task! Read the task and complete the LEGO challenge idea. Race a friend or sibling. Who can complete the challenge the fastest? 

How to Get Started:

Discovering how to use the LEGO pieces you already have to make something cool is a great skill for young kids to learn early on. You don’t always need more of something. Instead, use your imagination and work with what you already have!

Here are a few tips:

  • Don’t have enough of one color? Use another!
  • Have a fun piece you can use instead? Go ahead!
  • Want to take the challenge to another level? Make up your own additions!
  • This Classic LEGO set is perfect if you need to add pieces to your collection.

The goal is to be able to put those critical thinking skills to the test!


Download and print the monster-building challenges below. 

Click below to get your printable LEGO Activities


Printable LEGO Brick Building Project Pack

Breathe new life into your existing LEGO or brick collections!

Grab the whole Brick Building Fun Pack in our SHOP

  • 10O+ Brick theme learning activities in an e-book guide using the bricks you have on hand! Activities include literacy, math, science, art, STEM, and more!
  • Brick STEM activity challenges complete with instructions and examples such as a marble run, catapult, balloon car, and more.
  • Brick Building STEM Challenges and Task Cards keep kids busy! Includes animals, pirates, space, and monsters!
  • Landmark Challenge Cards: Virtual tours and facts to get kids building and exploring the world.
  • Habitat Challenge Cards: Take the challenge and build your own creative animals in their habitats
  • Brick theme I-Spy and Bingo games are perfect for game day!
  • Screen-free coding activities with a brick theme. Learn about algorithms and binary code!
  • Explore mini-fig emotions and much more.
  • A complete year of Brick themed seasonal and holiday challenges and task cards
  • Brick Building Early learning pack filled with letters, numbers, and shapes!


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