Nobody believes Squirt when he tells them that he met a bug so small it can't be seen, not even his parents; Shimmer become interested in playing the bugpipes, but then secretly changes interests to dancing.
Bounce is reluctant to try new things during a day trip led by Grandma Betty and Uncle Gus; Holley leads Squirt, Bounce and Snowdrop on a trip to the top of Big Tree to earn their Bug Scout wings.
Dragon pretends to have the bug flu to get out of going to a party he believes will be boring; Squirt finds himself missing things because he loses track of the time.
Squirt faces a dilemma when promises to be in two places at once; Spindella buggysits the kids when Holley and Miss Spider have out a night on the town for their anniversary.
Spindella's niece comes to visit, but it takes a while for Squirt to warm to the idea of playing with her; Shimmer tells a story to get help her siblings get to sleep during a storm.
When a new family of frogs moves into their Taddy Puddle, several of Miss Spider's little bugs secretly befriend the frog Felix. Meanwhile, Spiderus, worried by the "invasion," creates the Anti-Frog Squad.
Having spent the night at the Cozy Hole, it's time for Felix the frog to return home. He expresses a desire, however, to stay, worried that his parents don't love him as he is.
When Miss Spider's adopted daughter Shimmer learns she may be a long-lost jewel beetle princess, she hatches a plan to fly to Mushroom Glen to discover her true origins.