Tiered upper racks angle the covers toward the room, so a child picks a book by its picture instead of pulling spines out one at a time. Below them sit 2 wide lower shelves sized for building blocks, bins and larger toys, which keeps the heavy items low and the frame stable. The upper racks are rated for 11 lbs each and the lower shelves for 33 lbs, a split that matches how the two zones actually get loaded. Engineered wood is odorless and sanded smooth, and an anti-tipping kit secures the unit to the wall. At 29 inches wide, 12 inches deep and 32 inches tall, it fits along a nursery wall without eating the play area, and the assembled unit weighs 36 lbs.