Suggestions by @leolorest

Karen Prell

as Red Fraggle in PBS Kids Interstitials (1999)

Steve Whitmire

as Wembley Fraggle in PBS Kids Interstitials (1999)

Dave Goelz

as Boober Fraggle in PBS Kids Interstitials (1999)

Carlo Bonomi

as Pingu in PBS Kids Interstitials (1999)

James Kirk

as Perry Parasaurolophus in PBS Kids Interstitials (1999)

John Tartaglia

as Gobo Fraggle in PBS Kids Interstitials (1999)

Kathryn Mullen

as Mokey Fraggle in PBS Kids Interstitials (1999)

Betty White

as Betty White in PBS Kids Interstitials (1999)

Eric Jacobson

as Fozzie Bear in PBS Kids Interstitials (1999)

Peter Linz

as Tutter The Mouse in PBS Kids Interstitials (1999)

Tara Strong

as Additional voices in Toopy and Binoo Reboot

Aidan Vissers

as Xavier Riddle in PBS Kids Interstitials (1999)

Aja Wooldridge

as Dot (2013) in PBS Kids Interstitials (1999)

Erika shaye gair

as Cory Corythosaurus in PBS Kids Interstitials (1999)

Richard Hunt

as Gladys The Cow in PBS Kids Interstitials (1999)

Eric Jacobson

as Miss Piggy in PBS Kids Interstitials (1999)

Frankie Cordero

as Rudy Monster in PBS Kids Interstitials (1999)

Milo Toriel-McGibbon

as Bob Ross (Kid) in PBS Kids Interstitials (1999)

Stephanie Nadolny

as Helen Henny in PBS Kids Interstitials (1999)

Bob Ross

as Bob Ross in PBS Kids Interstitials (1999)