From June 18 – June 26 the The New York Hall of Science is hosting Brick Fest Live.  Last year’s event looked pretty cool.  If you want to see some great mini-architecture or build some of your own, you should check this out.  It’s Free with NYSCI admission.
Monday – Friday; 9:30 am – 5 pm
Saturday & Sunday; 10 am – 7 pm

The Hall of Science is right in the middle of Flushing Meadows–Corona Park.  Consider walking, jogging, or biking to the event or just hanging out in the park afterwards.  Exploring Queens Parks is a lot of fun and you never know what you’ll find.