Remember Kid safe search engines are not always safe! You should always be supervised by an adult when using the Internet!
When searching for images..like photos (jpegs, jpg, png, files) you can not guarantee what you might see, even if the site is suppose to be safe. People who are bad like to slip in inappropriate pictures into "kid safe" image search engines. Always have an adult present. If you do come across an image that is bad, minimize your screen and immediately find an adult!
You will be much safer looking for clipart (gif files). You are less likely to come across something bad when searching for clipart. Remember clipart is generally cartoon-type pictures or illustrations.