Here is the evolution of The Wiggles Logo.
Design 1 (1991-1996)

The first Wiggles logo was the band's name, typed out in the font Amigo and manipulated slightly. There was no standard colour scheme for the logo, and the logo itself was used from their first album in 1991 until Wiggly, Wiggly Christmas in late 1996.
Variants
Blue variant
Concert variant
(1995-1998)
(1995-1998)
Wiggle Time! variant
Yummy Yummy variant (used in the credits on the booklet)
Big Red Car variant (used in the intro of the video)
Wake Up Jeff! variant (used on Linko Junior Drum Kit)
Design 2 (1996-present)

In 1996, the logo was redesigned, featuring stylised letters and specific, set colours for each letter as well as the background, which is still in use today. The font used is Cori Sans Bold. The background is yellow, the word 'The' is colored red, the dot on the ‘i’ is green (possibly representative of Dorothy), and the 'L' is purple, leaving the other letters blue.
Variants
Outline variant (1996-1997)
The Wiggly Big Show variant
Wiggly, Wiggly Christmas variant (1997, 1999)
1997-1998 variant
1998-2001 variant
2001 variant
A strange variation of the logo from the 1999 cassette "The Wiggles." The background is blue/gray and all of the letters are red.
Go Santa Go! Special Guests Bert & Patti Newton variant (2013)
The Wiggles' Big Ballet Day! variant (2019)
PC Game variant
PC Game variant 2
Print variant
Print variant 2
15th Anniversary variant (2006)
20th Anniversary variant (2011)
25th Anniversary variant (2016)
Space Dancing! DVD menu variant
Wiggledance! & TV Series 1 variant (1997-1998)
Splish Splash Big Red Boat 3D variant (2006)
Space Dancing! variant (2003)
Hoop-Dee-Doo It's a Wiggly Party variant (2001)
Toot Toot! variant (1998)
Wiggle Fun Tour! variant (2019)
Blank variant (1996-2010)
Word-mark (1996-present)
Blank Gradient variant (2010-present)
Word-mark (2010-present)
Blank variant (1997-2001)
Word-mark (1997-2001)
Horned variant (2004)
A strange variant
Happy 15th Birthday variant (2006)/Special DVD variant (2009)
Whoo Hoo! Wiggly Gremlins variant (2003)
Exhibition variant 1
Exhibition variant 2
Party Time Tour! variant (2019)
Concert variant (1997-2011)
Concert variant (2011-2014)
Yule Be Wiggling variant (USA)
3D variant (2006)
TV series 2 variant (1999-2001)
It's a Wiggly Wiggly World! variant (2000)
The Wiggles logo as seen on the 2002-2004 Online Store website
The Wiggleworld.com Logo
The Wiggles Water World Logo (2008-2010)
Logo seen in the Wiggles Movie (1998 VHS) inlay
Shadow variant
Logo as seen on Wiggles Screener VHS Tapes variant
The Wiggles Magazine variant (2000-2001)
It's a Wiggly Wiggly World! USA cassette variant (2002-2003)
Dorothy the Dinosaur's Beach Party variant (2012)
It's a Wiggly Wiggly World! variant (2005)
Yule Be Wiggling DVD menu variant (2001)
The Little Wiggles variant
(2005-2006)
(2005-2006)
The Little Wiggles variant (2006)
The Little Wiggles variant
(2017-present)
(2017-present)
The Original Wiggles variant (2020-present)
Blue Wordmark
Website variant (1997-1999)
Red Wordmark
The Wiggles Logo transition
The Taiwanese Wiggles Playhouse Disney logo (Variant 2)