April 23, 2014 11:47 PM 
 
 GREELEY, Colo. (CBS4) – A school in Greeley is asking parents to be more vigilant after a 10-year-old boy admitted to selling marijuana to other students on the playground and another student came to school with a marijuana edible candy bar. 
 
 Both incidents happened in one week. 
 
 School officials are now asking parents to pay attention to where they are keeping their recreational marijuana after the fourth graders brought the items to Monfort Elementary School in Greeley. 
 
 John Gates, director of safety for Weld County School District 6, said there were four students involved — three boys and a girl. The students were all 10. 
 
 Gates said the students faced tough discipline but not suspension or expulsion but would not provide specific details on their punishment. 
 
 One boy admitted to taking a small bite of the candy bar but he didn’t get sick, and a medical exam showed he didn’t suffer any harmful side effects. 
 
 Gates said the boys told them they got the pot from home. That marijuana appears to have been legally purchased by adults. The grandparents in two families apparently made the purchases. No charges are expected to be filed. 
 
 On Monday a student who was not involved told school officials about the pot selling on the playground and the next day a student tried to trade an edible for some of the student’s marijuana. 
 
 “It was the simple fact that we had adults that didn’t secure their marijuana,” Gates said of the grandparents, urging adults to take care with the drug. “That sure is concerning because this would have never happened had the marijuana not been so accessible to two 10-year-old boys.” 
 
 Monfort Elementary School principal Jennifer Sheldon sent home a letter to parents on Tuesday stating that even though it’s easier for adults to get marijuana, children potentially have greater access. 
 
 A portion of that letter reads: “We urge all parents, grandparents and anyone who cares for children to treat marijuana as you would prescription drugs, alcohol or even firearms. This drug is potentially lethal to children, and should always be kept under lock and key, away from young people.” 
 
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 DENVER (Reuters) - A Colorado woman has been arrested for giving a marijuana-laced brownie to her teenage son who ate the confection and suffered serious injuries when he later jumped out of a third-story apartment window, police said on Thursday. 
 
 Julieane Jablonski, 38, was booked on suspicion of providing marijuana to a minor and felony tampering with a witness, the Fort Collins Police Department said in a statement. 
 
 Jablonski gave the pot brownie on April 14 to her 19-year-old son, Austin Essig, who then started acting strangely with witnesses saying he ran toward the window and jumped out "without hesitation," police said. 
 
 Police did not describe the exact injuries Essig suffered in the three-story fall, but said he was seriously hurt. 
 
 Colorado voters in 2012 sanctioned recreational use of marijuana, but only for those aged 21 and older. Voters in three other states and the District of Columbia have done the same, but pot remains illegal under federal law. 
 
 Jablonski could not be reached for comment. 
 
 She appeared in court briefly on Thursday and the Larimer County District Attorney's Office has formal charges pending against her, the Fort Collins Coloradoan reported on its website, citing court records. 
 
 Since Essig is over 18, Jablonski normally would have simply been given a misdemeanor citation, but the witness tampering charge is a felony that prompted her arrest, Fort Collins Deputy Police Chief Cory Christensen said. 
 
 "She allegedly attempted to get other witnesses to change their stories," Christensen said. 
 
 Jablonski was arrested on Wednesday, according to a police booking report. 
 
 It was the latest of several incidents of pot users harming themselves that authorities in Colorado have confronted since retail sales of the drug began there last year. 
 
 In March 2014, college student Levi Thamba Pongi of the Republic of Congo leaped to his death from a Denver hotel after consuming six times the recommended amount of marijuana cookies, with the Denver medical examiner's office listing "marijuana intoxication" as a contributing factor in his death. 
 
 Last month, 22-year-old Luke Gregory Goodman shot himself to death in a Colorado ski resort town after witnesses said he ate a large amount of pot candies, the Summit County coroner said. 
 
 (Reporting by Keith Coffman; Editing by Alex Dobuzinskis and Peter Cooney)
– Two veteran columnists weigh in on the legalization of pot in Colorado and in Washington state, and neither is happy about it: David Brooks: He smoked for a while as a teen. "It was fun," he writes in the New York Times. "I have some fond memories of us all being silly together. I think those moments of uninhibited frolic deepened our friendships." But he and his friends "aged out," moved on, and gave up pot after some "embarrassing incidents," generally deciding it wasn't how they wanted to live their lives. And now he's worried these laws send the wrong message. "In legalizing weed, citizens of Colorado are, indeed, enhancing individual freedom. But they are also nurturing a moral ecology in which it is a bit harder to be the sort of person most of us want to be." Ruth Marcus: She, too, did her "share of inhaling," but, she, too, is worried about legalization. In particular, she cites an AMA study asserting that teens who indulge might end up with lower IQs and moodier countenances. "On balance, society will not be better off with another legal mind-altering substance," she writes in the Washington Post. "In particular, our kids will not be better off with another legal mind-altering substance." Counterpoint: At Gawker, Hamilton Nolan reads them both and sums up: "What these two affluent Caucasians are trying to communicate is: I do not care how many young minorities must have their lives ruined by being arrested for weed. I demand we keep in place a law that I acknowledge is purely for show and that I know will be widely ignored, in order to assuage my conscience about the upbringing of white teenagers."