Tyson's Corner Center Mall, Washington DC
Address 1961 Chain Bridge Road, McLean, VA 22102 Map, Website
They have a great, new, free indoor playground sponsored/built by National Geographic at the Food Court and they have nice little animal figures, soft floor, little slides that your little kid can play on. There are seats on the perimeter for parents/guardians. Also on Wednesdays, from about 10 or 11 a.m. or so, there's a free kids club with activities such as a musician singing, or party experts giving away balloons. There's also an indoor train in the same area for a small fee. Food is good too--we always have Five Guys Burger, and shops are the best. One parent can shop while the other watches the kids :-)