NO INTERNET SITES. (unless they are great, ive been to a lot and they dont really tell you thing little children can do, unless they are coloring)
Check Vacation Bible School curriculum for great ideas that you can adapt to younger children. Many christian stores have great books and supplies for VBS.
Also- adapt small items that the children can remember - for example the parable of the mustard see- eat pretzels and mustard- make a Craft project with mustard seeds.
Adam & Eve- eat apples and make apple print pictures.
Noah's Ark- Act it out and have each child pair up to be one of the animals as you read a child adapted version of the story -
Make a felt board and tell stories using it.
kids this age can relate to the stories if you bring it down to their level. Pick five or six bible stories- verses that you want to startw ith and brainstorm with the people that help you - I'm sure you can come up with create ideas... just make them hands on and short - have two or three activities that you can transition into quickly... Have FUN!