Time Out says
It's not polite to play with your food—unless, of course, it's in the name of charity. During Canstruction, families can gaze at towering structures built from cans of food by leading architecture and engineering pros. Once the winner is decided at the end of the contest, all the items are donated to City Harvest to benefit hungry New Yorkers. Families can join the efforts by bringing their own canned goods to the exhibition space. Ages 2 and up.