If you're planning on using a tent outdoors, it's important to make sure that it's waterproof. Many tents are made with water-resistant materials, but they're not necessarily waterproof.nnIf you're not sure whether your tent is waterproof, you can test it by spraying it with water from a hose. Be sure to do this test in an area that won't be damaged if the tent does leak. If you find that your tent is not waterproof, you can try treating it with a waterproofing spray. These sprays can be found at most sporting goods stores. With a little bit of care, your play tent can provide hours of fun for your kids - even in the rain!