I got cheap yellow construction hats at the party store and made a label to go on front.
LEGO ACTIVITIES & GAMES:
We got a small race car Lego kit for each child to build then they raced them down a car slide in our hallway.
We put the Legos on felt mats (just a 8x11 felt sheet) so the pieces would stay put while building.
Lego Builder Hat Sign:
I found the amazing Lego font to make these labels. You can print them out for the hats. Copy and paste into word and print them.
Free Printable. For non-commercial use only. 
I made a 9x13 cake then added 6 cupcakes to the top and frosted it all yellow. Then I added mega blocks all around the edges for some color. I’ve seen much fancier cakes done but I was in a rush and my 5 year old could care less, it was the thought (fitting with the theme) that counts.
Mini figure Lego head jar party favors. Click here to see how I made these out of baby food jars.
Then we threw mega blocks all over the floor and had them race to see who could build the biggest tower in 1 minute. MORE LEGO PARTY IDEAS:
Incredible Lego Star Wars birthday party, a Lego Head cake and Indiana Jones Lego birthday party from Ashlee at I’m Topsy Turvy.
Make Lego Crayons or Lego Gummy Snacks with a mold by Ashlee too.
Great Lego printables, games and Lego cake pop ideas at Living Locurto.
Colorful lego decorations and a cute bunting banner at Busy Me, Busy with Three.
Fun Lego Party juice box covers, invitations and games at My Many Colored Days.
Awesome party with a Lego head cake and pin the smile on the Lego head game @ I saw that going differently in my mind.
Make your own Lego Mini Figure Photo Op Boards @ Big D & Me.
Picture Mix up with Mega Blocks from I Love Chesterrific.
LEGO BOOKS:
If your kids like Legos, get them excited about reading by picking a book featuring Legos. Here are some cute and INEXPENSIVE (check out the one for only a penny + shipping) ones we'd recommend.
Linking this idea to more great projects at:
