Newer pet safe products are available and should be used if possible. If you would not let a toddler have access to something, never let a puppy play with it. This applies to everything from sewing needles to pop cans to matches. Puppies, even the tiniest ones, will put their paws up on low end tables and get at anything you have left lying there. Household plants offer their own set of dangers.
Many plants are poisonous.
The seeds of some plants are as dangerous as plants themselves. Apples are not poisonous, but apple seeds are. Again, check with your veterinarian for a complete list. While it may be necessary to leave puppy alone for short periods, he or she should be confined to a safe area. Never let a puppy roam free outside or inside your house.