Come On, Kids!

 is a song as the Fireside Girls, Phineas, Ferb, Stacy, and Jenny try to destroy the gelatin monster by squirting it with a variety of water guns, water balloons, etc ("Day of the Living Gelatin").

Lyrics
Well I know what we should do today! A-come on kids Let's squirt that gelatin monster! (Yeah!) A-come on kids Let's squirt that gelatin monster!

(Huh-Huh-huh-huh-huh) Ooh, Ooh Squirt that gelatin monster! Ooh, Ooh Squirt that gelatin monster! A-come on kids Let's a-squirt that gelatin monster! (Yeah!) A-come on kids Let's a-squirt that gelatin monster!

(Huh-huh-huh-huh-huh) Ooh, Ooh Squirt that gelatin monster! Ooh, Ooh Squirt that gelatin monster! A-come on kids Let's a-squirt that gelatin monster! (Yeah!) A-come on kids Let's a-squirt that gelatin monster!

(Huh-huh-huh-huh-huh) Come on kids Let's a-squirt that gelatin monster!

Background Information

 * The monster and the kids dance like how Mystery Inc. and young Scooby-Doo would always dance with the monster while they would chase it.
 * Prior to the confirmation of the official title, this song was listed at the wiki as Let's Squirt That Gelatin Monster.