Easy LEGO Birthday Party Ideas that Don't Break the Bank

This year, our youngest so turned nine! I am in disbelief, let me tell you! For his party, he asked for a LEGO birthday party theme, and I was happy to create one for him. I have secretly wanted one of the boys to ask for a LEGO themed party for years, because it looks so fun and cheery with all the primary colors! And so, with the LEGO party in the books, here are all the easy LEGO birthday party ideas that don’t even break the bank!

Officially, this is my 20th themed birthday party-only 2 repeats (dinosaurs, trains) unless you count our Lego Ninjago party which really felt so much more like Ninja than Lego.

Last year I celebreted a “Decade of Birthday Parties” by writing a birthday party ebook filled with all my DIY birthday party tips. You can, of course, browse my birthday party blog posts, but this book collects them all in one spot, and organizes them by task like decor, cakes, etc.

Easy LEGO birthday party ideas

Throwing a Lego brick themed party was surprisingly easy because it relies mainly on primary colors (easy to find!) and basic rectangle and square shapes! You can get so many decor materials at a dollar store, which makes this party theme a very budget-friendly party.

Lego Party Games:

Pin the Head on the Minifigure – I downloaded a free printable here for this game. You will get several image files and have to put those into a document to print out (or if you want to print each one, you’ll have to adjust the size or you’ll get huge heads that are as big as the body!).

Vote for your Favorite Minifigure – This game my kids invented. They created mini figures they liked and passed around a sheet of paper for everyone to vote.

Guess How Many LEGO Pieces are in the Jar – Hubby got the fun job of counting each piece as he put them into a pint mason jar (a quart would work if you use larger pieces). Then everyone went around and made their guesses. You could do this for a prize – since we have birthday parties with just family (cousins and aunts and uncles), we just play the games for fun!

Lego Party Decor

Primary colors are where it’s at! Yellow, red, and blue dominate. But in a pinch if you have white or green it doesn’t throw the look off too much. This multi-color scheme makes it super easy to find materials for decor (except that yellow wrapping paper! I had to go to 2 Party City stores for that!).

Using this idea from Sarom Inspired, I created huge poster board “bricks” as a backdrop for photos. She used plastic plates glued on, but I could not find all the colors, so I just traced a plate onto paper and applied with foam dimensional stickers. The boys had just pooled their plant sale money a month ago to buy a giant Lego set, and received a HUGE paper bag from the Lego store that I cut the handles off of and added to the background.

I was offered several slim, rectangular boxes at the Dollar Tree (they held candy bars), that were perfect for wrapping in colorful paper and making into large 3D “bricks.” I traced circles with a glass on cardstock to make the studs and applied them with dimensional foam stickers.

Voila! Now you have a 3D brick wall with actual bricks for a background!

All the gifts were wrapped in the remaining yellow, red, and blue paper, so the gifts also were a sort of decor!

The Dollar Tree also has several “brick” party items – like the Happy Birthday banner (it’s the first year I did not make my own banner! WOW! But I could not pass up how cheap and easy this one was!). They also sell brick paper goods, brick favor boxes, and brick drink containers (we don’t drink from plastic if we can avoid it so I did not buy those).

The boys also helped out with the decor as well. They made a utensil holder, candle holders, number 9 plaque, and number 9 cake decor, and stuck LEGO minifigures everywhere!

Plus, they drew LEGO faces on yellow balloons which we taped up everywhere to fill in the gaps. And drew faces and LEGO motifs on yellow party cups that held treats.

At this age, creating LEGO themed party decor was literally the easiest party decor ever!

Lego Birthday T-shirt

Every single year, I try to ditch the T-shirt making. But every year my boys say they WANT a birthday t-shirt. Absolutely the party shirt has become a tradition!

Making this winking LEGO head was literally a 15-minute job, thanks to the t-shirt template from Busy Mom Happy Kids and some freezer paper I already had on hand. Just print, cut, iron on, and paint. I used black chalkboard paint and a foam brush.

Lego Birthday Party Cake

There are so many ideas for LEGO birthday party cakes. Thankfully my son just wanted bricks. Did I say thankfully!? Ha! This turned out to be sticky business. I ended up buying pre-colored frosting for red and blue and using white with food coloring for yellow. We do not usually do a lot of food coloring in our family but for birthday cakes, I make an exception. You can try natural food coloring, but might not get the bright effect of LEGO colors.

For the cake I made a 9×13 rectangle and two squares. I cut about a 1″ strip off the rectangle to narrow it into more of a brick shape. I left one as a square. The other square I cut two smaller pieces and stacked them for a higher brick effect.

The studs are made from an Oreo cookie. After frosting the flat cakes, stick Oreos on the frosting for studs. Then pipe or spread frosting over the top and down the sides.

My frosting was very gloopy, so I did not achieve a very smooth brick effect. My son said he loved it, and that is all I care about!

I did purchase some brick candies and M&Ms for the dessert table as well, which were fun and festive!

Budget-friendly Lego Party Ideas!

I often spend over $100 on birthday party decor and dessert tables (this does not include the dinner food), but this party was my least expensive yet!

It cost me about $15 for the decor, and about $40 for the dessert (3 Trader Joe’s cake mixes, frosting, Oreos, brick candies, and M&Ms). It feels like the cake cost a lot, but I usually spend quite a bit on specialty candy decor items for my cakes, so this feels about right. Certainly you can spend much less on cake ingredients, but we have our favorite cake mix!

Have you ever done a Lego themed party? Share your ideas in the comments below!