Rubber Mulch is very toxic. It could make you very sick. In the summer, the rubber mulch is very hot and it could burn your feet. Rubber mulch can cause long-term health problem like lungs, cancer... if you breath in the toxic air and dust from the rubber mulch. My son's experience is he has an allergic reaction to the rubber mulch with rashes, blisters, eyes itching and even blisters on his eyes lids We would live a much better, healthier environment for our kids to play in if the rubber mulch is be removed.