Science solves it!

After cousins Kyle and Jenna discover how their older siblings managed to scare them by using shadows, they use the same trick to get revenge.

When Andy forgets to do his science homework, he luckily manages to complete the plant scavenger hunt on his way to school.

When Dan accidentally brings an earthworm to school, he gets a homework assignment that helps him solve a nagging problem--what to give his mother for her birthday.

When Molly and her sister notice bats in their neighborhood for the first time, they become suspicious of the new girl in school nicknamed Vampire Vivian.

When messy Wayne goes away to camp, his younger brother Jeff throws out some old food containers that he finds in their room, but then he learns that Wayne is working on a science project about mold, and he must try to recreate the experiment before Wayne gets home.