Hijinx Ensue!
On the humor for kids front, give it up for Scaredy Squirrel, a little guy who is afraid of pinching lobsters, unicorns, confetti, porcupines, Godzilla, germs, pirates, menacing seagulls, Bigfoot, scary sharks, killer bees, and walruses!
Scaredy makes complicated plans to avoid his fears but ultimately learns to face situations that are not nearly as scary as he first thought. The series author is Melanie Watt.
Also try similarly-themed Big Chickens by Leslie Helakoski or for older kids, the Alvin Ho Series by Lenore Look.
Funny Cats!
Chester the Cat by Melanie Watt
Bad Kitty by Nick Bruel
Pete the Cat by Eric Litwin
Splat the Cat by Rob Scotton
Cat Skidoo by Bethany Roberts
Cat Count by Betsy Lewin
Opera Cat by Tess Weaver -- That Cat Can't Stay! by Thad Krasnesky -- Fat Cat by Margaret Read MacDonald -- Simon's Cat by Simon Tofield
Funny Mice!
Mice and Beans by Pam Munoz Ryan
Cavemice by Geronimo Stilton
Babymouse by Jennifer and Matthew Holm -- Benny and Penny by Geoffrey Hayes -- Cinco de Mouse-O! by Judy Cox -- Library Mouse by Daniel Kirk -- Mice by Rose Fyleman -- Mousetronaut by Mark Kelly -- Penny by Kevin Henkes -- Tumtum & Nutmeg by Emily Bearn
Funny Series Books!
Bink & Gollie by Kate DiCamillo and Alison McGhee
Stink by Megan McDonald
Babymouse by Jennifer L. and Matthew Holm
Diary of a Wimpy Kid by Jeff Kinney
Big Nate by Lincoln Peirce
My Weird School by Dan Gutman
Shredderman by Wendlin Van Draanen -- Lunch Lady by Jarrett Krosoczka -- Spaceheadz by John Scieszka -- Vordak the Incomprehensible by Scott Seegert -- Dork Diaries -- Rachel Renee Russell