Nice! However some humans can be quite heavy. Depending on the wood species, the board may break, especially if they drop down into it. To strengthen it you can

Nice! However some humans can be quite heavy. Depending on the wood species, the board may break, especially if they drop down into it. To strengthen it you can glue+screw a board on-edge to the middle of the bottom of both boards (running front-to-back, not side-to-side). This will significantly increase its bending strength but hardly be noticeable.