There's only one thing that scares the dinosaurs at the dinosaur museum;the sound of thunder! So when a big storm frightens them away, it's up to Team Umizoomi find the missing dinosaurs and lead them back home.

Milli is visiting her friend Emily’s class for Favorite Things Day! That’s the day everyone brings in their favorite things to show the whole class.

Olly realizes he forgot to put stamps on a package he sent to his Grandma. Team Umizoomi zooms behind the scenes of the post office, and into the mail system to catch up to the errant package. They determine how many stamps the package need and ensure that Grandma gets her delivery---a special picture of the two of them drawn by Olly.