Cissy Bakko, a sales associate at Mary Jane’s House of Glass, greeted customers Thursday with a cheery “Happy Legalization Day!” Initiative 502 went into effect Thursday, making it legal in Washington for people age 21 and older to possess small amounts of marijuana for recreational use. The limits are an ounce in plant form, 16 ounces marijuana-infused product in solid form and 72 ounces of marijuana-infused product in liquid form.