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DENVER \’97 A Colorado proposal to widen a ban on certain types of edible marijuana advanced Thursday in the state House amid concerns that it could be too broad. What lawmakers are trying to prevent is accidental ingestion by children who can\’92t tell the difference between a regular cookie or gummy bear and the kinds infused with cannabis. Lawmakers also worry that officials won\’92t be able to know when students have marijuana at school when the drug is in the form of an edible. \’93They\’92re hard to find, they\’92re hard to identify, and they\’92re hard to locate,\’94 said Rep. Frank …\ ]]>\