The Becta publication "Using web-based resources in Primary RE" suggests a number of websites offering interactive content for use by children in RE lessons. Some of the links may not always be available. However, for quick access most of the sites mentioned are listed below.
Using email - KS1 (SIKHKids.com)
Comparing three churches - KS2 (Educhurch)
Prayer and worship in Hinduism - KS2 (Hindu Kids)
Listening to children talking - KS2 (PCfRE)
Jesus is born - KS1 (Religious Stories - Topmarks)
Prayer in Islam - KS2 (Learn Islam)
Interactive creation table - Reception (Dottie and Buzz)
Picturing Jesus - KS2 (RE Jesus)
Infant Baptism - KS1 (RE Quest)
Stories from Buddhism - KS2 (dharmaforkids.com)
Putting beliefs into action - KS2 (GlobalGang)