Sid is very excited because he's going to babysit Grandma's dog Philbert for the weekend. This is a great way for Sid to show his parents that he's ready to take care of his own puppy. But there's only one problem...how exactly do you take care of a pet? Sid heads to school to investigate more, and is delighted to see the special guest. It's Gabriela's Mom, Dr. Rosalinda Cordova! She brought the class their very own pet...a praying mantis! And now the kids have to learn how to take care of it. That means investigating what the praying mantis needs to eat, drink, and what kind of home it needs. As Sid quickly discovers, taking care of a pet is a big responsibility!