On Amazon's Website a mother who called herself Heidzgo answered a question about the Echo's ordering capabilities. It seems she had to disable that feature:
" We disabled ordering after my 3 year old asked, "Alexa, do you have jelly beans at your house?" She did and she sent us a $17 bag of them! He also nearly ordered a new vacuum, but luckily didn't complete the purchase. Amazon was very cooperative about returning the jelly beans and refunding us the $, but we disabled Echo ordering to be sure it didn't happen again."