Pushpins on foamboard. Trace your design first, buy twice as many pins as you think you'll need. If framing, cut foam board to frame first. - Cute way to use the push pins I bought for my DIY headboard and didn't end up using.
31 Impossibly Fun Wedding Ideas: instead of a kids table include a small bucket of crayons and coloring books on each table, with a sign that says "for kids and adults who love to color". Or something similar to that phrase:) kids area, let them be free!