dora kennedy. >>> the national building museum has created a massive beach with plastic balles and evene beach chairs. news 4 and a few families were there to try out the experience for the first time. >> yeah. it's -- i'm pretty blown away. i think only a place like the building museum would have something this expansive. >> the interactive exhibit is open for a two-month run. for a small fee, you can relax by the sea or even try swimming in it. the balls are treated with a microantibiotic for safety. >>> that's all for news 4 this week. i'm chris lawrence. thanks for joining us. have a great weekend. is there an elk in your bed? with sleep number now there's an adjustment for that. only at a sleep number store. don't miss the final days of the lowest prices of the season. save $300 to $700 on selected mattress sets. ends sunday! know better sleep with sleep number. welcome to fort green sheets. welcome to castle bravestorm. it's full of cool stuff, like my second in command... and my trusty bow. and free of stuff i don't like. and in my castle we only eat chex cereal. chex cereal. it'