When she activates her magic stethoscope (similar to an amulet or talisman), she can create a variety of supernatural effects, including traveling through time. Her most regular use of it in the show is to cause toys, dolls, and stuffed animals to come to life. They are able to move, speak, hear, see and smell, and she can interact with them. With help from her stuffed friends – Stuffy the Dragon (a. k. a. Stuffy Philbert McStuffins), Hallie the Hippo, Lambie the Lamb, and Chilly the Snowman – Doc helps toys recover, or “feel better”, by giving them check-ups and diagnosing their fictional illnesses with an encyclopedia called “The Big Book of Boo Boos” and another encyclopedia called “The Big Vet Book” for her toy pets when she’s a veterinarian. In Season four the Big Book of Boo Boos and The Big Vet Book go Hi-Tech in a tablet form.