Philadelphia recently announced plans to all but decriminalize the possession of small amounts of marijuana (up to 30 grams) for personal use, but that certainly didn’t help out a 33-year-old single parent who was busted by cops this week after stashing weed in his son’s Elmo backpack. Ronald Washington — who accidentally placed two bags holding 105 grams of dope in his six-year-old son’s bag and was met by police when he went to school to retrieve it — is being held after failing to post $100,000 bail on charges of possession of a controlled substance, possession with intent to deliver, and disorderly conduct. “It was something dumb,” said Washington, who realized the stoner switch-a-roo when he tried to roll up and smoke his son’s school lunch.