A fun weekend activity turned sour when police were called to Chuck E. Cheese's restaurant on El Camino Real on Sunday, responding to reports that a 13-year old boy had molested and sexually harassed a number of young girls.

Police arrested the alleged juvenile fondler from Foster City and released him to the custody of his mother the same day.

The alleged incident apparently took place in one of the tunnels in a jungle-gym play area that the restaurant is known for. The boy allegedly had been asking to see the underwear of a number of young girls.