The timber used in the Sandpits are treated via high temperature drying, degreasing and is stained against wood rot and insect damage. The Sandpit comes with a UV-protected tarp as well as a internal ground sheet to prevent grass or weeds from growing into the sand play area, and also allows for water drainage. Keep your Toys/Tools stored neatly with two convenient storage trays. The Sandpits come partially assembled with pre-drillings on some areas to allow for easy assembly. All you'll need is a screwdriver and 45-60 minutes of your time.