EDMONTON — She's being called one smart cookie. As people lined up to buy cannabis at one of six Edmonton cannabis stores that opened Wednesday a small entrepreneur stood ready to capitalize on what could be expected to be customers' future need for a sweet snack. Nine-year-old Elina Childs had a wagon full of Girl Guide cookies for sale. "My dad asked me if I wanted to sell cookies and I said yes," she said in an interview after school Thursday. "So we started selling cookies there and they sold out very quickly."

Canadian Press Nine-year-old Elina Childs poses as she sells Girl Guide Cookies outside a cannabis store in Edmonton on Wednesday.

Her father, Seann Childs, said they sold cookies going door to door in their neighbourhood last year, but people often weren't home or there would be big dogs in the yards. "We thought, 'Where can we go to sell them?'" he said. "It just so happens that legalization was coming up in a couple of days." When Elina got home from school Wednesday, she grabbed some change from her piggy bank. She and her dad loaded up a wagon with three cases of Girl Guide cookies and they walked a few blocks to the nearby cannabis store. She started walking up and down the lineup. "It was well received," said Seann Childs. Elina said people told her "it was a smart idea and that they'd like to buy some cookies."

God bless this girl selling girl guide cookies outside of nova cannabis. 👏🏼👏🏼👏🏼#yegpic.twitter.com/dnI9HdBXPc — Emily Fitzpatrick (@_emilyfitzCBC) October 17, 2018

Her dad said some cars even stopped on the street to buy a box. "It was really something else," he said. "I'd never seen anything quite like that." Childs said he expected it to go well, but he never thought she would sell out of all the cookies they had left in the three cases — about 30 boxes — in 45 minutes. "We were sold out in no time," he said. WATCH: What's allowed in each province and territory. Story continues after video.