Grow 'N Up Build 'N Play SandBox QVC.com Build N Play Sandbox Toys R Us Canada Grow 'N Up Sand N Play Build A Box Modular Sandbox How to Build a DIY Sandbox Build N Play Sandbox Toys R Us Canada. Create a tiny beach getaway right in your backyard with the Grow 'N Up Sand N Play Build A Box! Perfect for little architects aged 1 to 3 years, this delightful sandbox makes both sand castles and splashing canals a breeze to construct. With its modular design and easy to lock pieces, setup and storage are as simple as building a sandcastle. The Grow 'N Up Sand N Play Build A Box features: Holds up to 200 lbs of sand with EZ clean floor liner Water resistant fabric cover doubles as a tote bag Includes a vibrant 10 piece accessory set Lightweight design at only 6. 3 lbs for easy portability Fun water play with deeply grooved canals