Gas cooker

I need your help 🙏🙏 I got a gas cooker where you have to push the botton for the gas to come out. Im a single mum with an open kitchen (so cant fit a safety gate) and my 1 year old is almost obsessed with pushing these buttons.. obviously i know its dangerous and tell her off, distract her, i tried everything! But the second she gets the chance, she is off to the cooker.. I told my HV and she said, "she is old enough to understand the word "no" ". Ofcourse she understands, but she doesnt care.. Anyone got tips? Every tip is welcome..