12 Unique LEGO Birthday Party Ideas For Your Little Builders (2025)

If your child is a superfan of LEGOs and has a birthday coming up, keep reading for 12 LEGO birthday party ideas that will make the big day extra special!

To help you get inspired when it comes to venue selection, we’ve also included a few examples of relevant spaces you can rent by the hour through Peerspace. It’s the largest online marketplace for event venue rentals, so keep an eye out for those as you browse this list.

1. For your color scheme, think bright, primary colors

One of the first elements you’ll want to consider when planning just about any party is the color scheme you want to use for your decor. In that vein, the first of our LEGO birthday party ideas is to ensure you use lots of bright primary colors – red, yellow, and blue. If you want to get even more specific and accurate, there are a total of 39 solid colors that make up the LEGO color palette. Red, yellow, and blue are the original and classic colors, but this article from Brick Architect shows all of them.

If you’re planning to rent a venue for your child’s party, we’d suggest looking for spaces that are easy to decorate with your own color palette. You can also opt for spaces that are already decked out in lots of color. One of our favorite examples is this event space inside the Public Market in Seattle, WA. It is a gamer’s paradise, offering a game room (with a LEGO wall!), a karaoke/dance lounge, and open catering. The fact that it boasts colorful light-up cubes will surely delight the kids, too!

“I’m so happy I booked Alley MIC for my event,” shares a Peerspace reviewer. “The space and host were very accommodating, and Fei responded efficiently to all my questions. The space was even better/cooler in person, and all my guests were very excited to wander around. I wasn’t aware there was a kitchen area, which was immensely helpful in serving food. We made good use of the space, spreading out and testing out the video games and also using the billiard lounge, and karaoke.”

2. Decorate with DIY giant LEGO bricks to save money

Sure, you can buy premade giant LEGO bricks to use as party decor, but when it’s so easy to make your own, why waste your hard-earned cash? This guide from Mom Does Reviews explains how to make your own LEGO bricks using easy-to-locate supplies like craft foam, acrylic paint, and permanent markers.

Even better, these homemade LEGO bricks are cute enough that you might want to use them to decorate your LEGO-obsessed child’s room after the party is over, so they can do double duty.

3. Bake a LEGO brick cake

This LEGO birthday party idea is not only easy – the cute shape is sure to be a hit with kids and parents alike. This easy LEGO cake recipe from Desert Chica is an excellent place to start. All you need is a box of cake mix, some colorful icing, and a few marshmallows to create the signature LEGO shape.

And if you need a well-equipped kitchen with event space to pull this one off, Peerspace can help! For instance, we love this kitchen loft space in SoHo, New York City as an option. It’s a more than 1,000-square-foot venue with a commercial kitchen with a lounge and dining space. The colorful decor is sure to please the kids and make your LEGO party a smash success!

A Peerspace user who booked their birthday dinner here shared the following review: “The best. So many compliments from our event guests on this space. It is fully equipped, impeccably clean, well appointed, and attractive. Getting access to the space and its overall utility was the easiest, most top notch experience.”

Discover more fun kids’ birthday party ideas here!

4. Serve your little builders some LEGO sandwiches

A group of hungry kids is going to need more than cake to keep their blood sugar steady and their stomachs full! Luckily, it’s super easy to make LEGO-shaped sandwiches in just a few minutes with whatever bread and fillings your kid and their friends prefer. If you’re interested, check out these instructions from In the Playroom.

5. Check out what kind of LEGO-themed party supplies you can buy

So far, most of our suggestions have been DIY stuff that you can make yourself if you’re on a budget or just like to craft. But LEGOs are so popular with kids that Oriental Trading also offers dozens of LEGO-themed party supplies. They include LEGO dessert plates, LEGO party banners, and lots more. They’re affordable, so definitely take a look at what this and other party stores have to offer online or in your area locally.

6. Ramp up the fun and plan some LEGO building challenges

The Many Little Joys has lots of suggestions for LEGO-building challenges that your kid and their friends are sure to love. Our favorite is to “see who can build the tallest tower in one minute”. Simple, but super fun!

7. Plan to have some other party games, too

There are lots of other LEGO-themed party games that will keep birthday party guests happily occupied. Start by taking a look at the Chickabug Blog’s ultimate list of LEGO party games!

You can also book a super fun Peerspace with games in mind, like this funky retro game room in Austin, TX. Aside from its indoor retro game room, it also offers you access to its backyard complete with a pool and a variety of lawn games to keep the kids and parents entertained.

In the words of a Peerspace reviewer who booked this Austin party pad: “We absolutely LOVED this Peerspace! It had so much fun activities for our guests and Jennifer, the host was so accommodating and met our needs throughout the event! We would HIGHLY recommend funky retro game room!!!”

8. Don’t forget to send LEGO-themed invitations

Be sure to send out your party invitations well in advance. And you can even set the tone for the party with LEGO-themed invitations. The official LEGO website even has free downloadable birthday party invites that would work perfectly.

9. Set the table with thematic tableware

We love this colorful building block tableware set that can serve up to 16 guests! Make sure that you buy extra to ensure you don’t run out of plates or cups in the middle of the party.

Still need a bright, adorable kid’s party-perfect venue for your little one’s LEGO party? Then check out this bright, clean event space with high ceilings near Baltimore, MD. Just imagine how amazing this venue will look when it’s all set up with your LEGO decor and games!

Our construction birthday party ideas can perfectly complement your LEGO party, too. Check them out!

10. Serve homemade LEGO head marshmallow pops

LEGO birthday party ideas like this are too cute not to include! Check out these homemade LEGO head marshmallow pops from Savoring the Good!

11. Make a cookie-decorating station and get all the kids involved

In addition to playing lots of party games, you might want to incorporate some other kinds of activities into your kid’s LEGO party.

One of these, suggested by Bird’s Party Blog, is a cookie-decorating station. You’ll have to “provide all the supplies needed so kids can decorate their own ‘Lego’ cookies. I provided colored icing tubes, rectangular biscuit and colored candy.”

12. Play all the fun music your child loves with ease

Set the tone for the celebration by playing music that your kid and their friends will enjoy. Even if they’re not actively listening to the music the whole time, having upbeat tunes playing in the background will help improve everyone’s mood. You can even have a dance party at some point as one of your party activities! The type of music you play will depend on what your child prefers, how old they are, etc., so that’s up to you.

If you’re renting a venue, be sure to find one with a sound system. For instance, this Irving Park, Chicago-based event venue comes with built-in speakers. In fact, the host even offers chic furnishings and funky backdrops that can make for fun kid birthday photoshoot settings. It’s definitely the type of venue that both kids and parents will enjoy, thanks to its style and amenities.

To quote one of the hundreds of positive reviews of this space: “This venue was absolutely perfect for my son’s first birthday. The beautiful mural wall matched our surf/beachy theme. The decor was cute and not overwhelming. We especially loved the flamingo neon sign. Quiet street, easy parking and a spacious venue. Access was easy and we didn’t have any issues. We definitely recommend!”

LEGO birthday party ideas: conclusion

When it comes to planning a themed party for your child, it seems daunting at first. But with this list of LEGO birthday party ideas and the perfect celebration space courtesy of Peerspace, it will come together easily and beautifully!

Find unique kids’ party venues on Peerspace