The Very Busy Spider by Eric Carle is a must. With the 4 year olds I had them recall the sequence of events. We put the animals in order from when they talked to the spider.
The YouTube Link for the Read Aloud
Making our own web...
(I love my Dollar Tree finds, webs and spider rings!)
-Jumbo Marshmallows cut in half (to represent the 2 body parts)
-8 stick pretzels