After six years of strong programming and attendance for both adults and children, the Boston Book Festival is expanding with a free, day-long festival just for kids, Hubbub: Creative Commotion for Kids, at the close of the school year.

The inaugural Hubbub will take place on Saturday, June 20 in Boston’s Copley Square, and will feature appearances by Mo Willems, Mitali Perkins, and Dan Zanes. Programming will include music; storytelling; writing and drawing workshops for kids; a variety of tents, including one on STEM projects; puppet performances; and yoga and dance classes.

“The offerings for children at the annual Boston Book Festival have been so popular,” said Boston Book Festival founder and executive director Deborah Porter, “that it seemed only fitting to develop another festival focused solely on cultural enrichment for children and families. Our aim is to be inclusive to families from every Boston neighborhood.”

The Boston Book Festival, which will be held October 23–24 in Copley Square this fall, will continue to include programming for kids and teens.