It's springtime and that means it's time to hunt for Easter eggs in the backyard. Explorer Sid searches under every bush and behind every tree, and he finds all the eggs Mom and Dad have hidden. But wait, he also found...a big shiny rock! Could it be...a treasure? Sid brings the rock to school and the kids try to identify the mystery rock. This leads to a special Easter themed investigation where the kids don bunny ears to find and sort different kinds of rocks on an Easter Rock Hunt!