Medical marijuana debate: Support flows for Cooper Rhett Wallace and Cassie Batten say their young son Cooper Wallace needs the cannabis oil. HUNDREDS of people are expected at a fundraiser today for a Melbourne family who have been treating their child with cannabis oil. Comedian Fiona O'Loughlin is among the names to have thrown support behind the Batten-Wallace family who are aiming to raise $22,000 for their son Cooper. Mernda parents Cassie Batten and Rhett Wallace made headlines when they declared they would continue feeding the four-year-old with medical marijuana despite warnings from police and child protection officers. The family hopes the money will go towards a new van that can accommodate Cooper's wheelchair. They also hope to raise enough money for a new chair. "That will be life-changing, just to be able to jump in the car and go," Ms Batten said. The family cannot fit into their car with the wheelchair, so even simple trips to the supermarket are a struggle. Cooper was looking forward to meeting O'Loughlin, who will appear at a trivia night in Mernda Saturday night. The fundraiser starts this morning with a market at the Morang South Primary School. Originally published as Community gets behind Cooper