Heres some things I found
http://www.birthdaypartyideas.com/html/lego.html
http://www.ehow.com/how_###-###-####_throw-lego-party.html
THE HIT OF THE PARTY:
Katie's mom baked a sheet cake, set eight cupcakes on top (held in place with toothpicks), and frosted it a bright color to look like a giant LEGO piece. "It was great," Katie recalls. "None of the adults knew what it was --and all of the kids did."
DECOR:
Streamers in bright primary colors and heaps and heaps of LEGOs.
FUN & GAMES:
In addition to just building with the bricks, Katie came up with a few other LEGO-inspired games.
•Build a tower. Katie's dad dumped a bunch of LEGOs on the floor, then timed guests to see who could build the tallest structure in two minutes.
•Guess how many LEGOs are in a jar.
•Pin the LEGO on the...LEGO. Create a landscape with an integral piece missing, such as a boat's deep-sea diver or a castle's flag, and, with eyes closed, kids must take turns trying to place it in the right spot.
FAVORS:
A small LEGO set and LEGO-shaped candies (available at some specialty candy stores).
LEGO CAKES
http://jas.familyfun.go.com/recipefinder/display?id=50163
http://www.kidsdomain.com/craft/legocake.html
Awesome Pics of lego cakes!!!
http://www.webshots.com/search?media=photo&query=lego...
LEGOS Party Idea
http://www3.toysrus.com/bdayrus/plan/brus_kd_plan_lego.cf...
Make cakes and jello Legos
http://shop.lego.com/ByCategory/Product.aspx?p=851915&...