Milk crates zip-tied together on their sides so that a bench seat fits on top and red bins from Lowe's can slide inside them. I don't have any milk crates, though. I also don't know what "zip-tied" means. I would use different colors.
The bucket filler board is a must! The kids can fill a bucket ANY time they want to! Every Friday, they check their buckets to find the kind words others have left for them to read. Also goes along with the book, 'Have You Filled a Bucket Today?
Reading and writing go hand in hand so I feel that having an extensive organized classroom library with books to interest all students at every reading level is important for fostering literacy development in the classroom.