Kids love to play with boxes. It's absolutely fine to leave those out for them to play with. But check for any metal staples that might catch on their skin or their clothing. In fact, It is best to take them out altogether and re-tape the box.

And a little known fact is that a lot of toy injuries actually occur because the toys have been left out, so a parent or a child trips over them and falls.

After you open a toy, you want to discard that packaging. There are some hidden hazards there for kids. Plastic wrap and bubble wrap can actually be a suffocating hazard. Kids can choke on the little foam peanuts that often come in packaging.