The Onset Bay Association will host its annual Christmas in the Park, on Saturday, December 4, from 12 p.m. to 4 p.m.  Various businesses in town will offer some holiday cheer.  Kids will be able to write a letter to Santa, then deliver it to him when he comes in to town.  Other activities include decorating a holiday treat, and going caroling through the streets of Onset.  The event is free and all are welcome.