Hmmmmnnn the problem with the temp folders is that they hold huge amounts of data associated with the site visited - from script elements to pictures - and each part of the page viewed is listed. Your system is unlikely to be able to open these in isolation. I'm not familiar enough with IE to unstick you but suggest you might try to copy and paste the address into your search engine and see if you can find the pages that way. Sorry not to be more help.
You might find some useful advice on
CEOP (Child Exploitation and Online Protection Centre). Even if the topics aren't directly relevant it might be a good place to start. I know they have information about keeping your child safe on the internet.