My five-year-old son was SO excited to get a slinky dog toy for Christmas this year. However, within the first week of use, the spring snapped and broke near the middle of Slinky's body. It seems to be made of some thicker plastic, not metal, which is a great safety feature in my mind, however, with it broken, the part at the break is very pointy and sharp and has poked through the fabric that covers the spring - dangerous (although the fabric cover over the spring was originally was a great feature in my mind). Anyway, Slinky is dead. And my five-year-old is disappointed.