Child Proof Your Kitchen Chairs. Thousands of kids are rushed to the ER annually after tipping over chairs. Jackaroo Legs prevent chairs from tipping over. Attach the Jackaroo Legs to your kitchen chair legs, or highchair legs, to provide needed support to prevent chairs and highchairs from tipping backwards. Avoid injuries and make your kitchen safer. Stabalize Kitchen Chairs. Anti Chair Tipping. Stabalize Highchairs.