Grobag egg the colour changing digital room thermometer is another clever innovation from the people who brought you grobag night lightr r room temperature is vital in creating a safe sleeping environment for a baby and should be maintained at 16 20c to help reduce the risk of cot death the grobag egg is a quick easy and effective way to monitor room temperature combining a thermometer with a soft nightlight glow when the room temperature drops below 16c the yellow light will change to