My boys are growing out of these now but they were all favourites at one stage or another....

Room on the Broom
The Gruffalo and The Gruffalo's Child.
The cat who walked across France
Madeline
The little red caboose
Where is the Green Sheep
Harry the dirty dog and harry by the sea
Peter Rabbit
Queenie the bantam
Let's get a dog
Olivia
The owl and the pussycat
Where the wild things are
The very hungry butterfly
Ernest
The man from Snowy river
Mulga Bill's Bicycle
Hop on pop
Green Eggs and Ham
The story about Ping
Tiki Tiki Tembo
Thomas the tank engine
Hairy McLairy
The when I'm feeling series


That's all I can recall off the top of my head but if I think of any more I'll edit my post to add them.