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Grover and Bert appeared in the episode posted on October 9, 2013 presenting "5 Fun Science Experiments for Kids" and promoting Sesame Street's Little Discoverers initiative. Following their appearance, a plush Grover doll was added to many items on the set.
Telly Monster later appeared in an episode presenting "5 Hidden Worlds Revealed Under a Microscope", uploaded on April 3, 2014.