This handy step stool is perfect for those of us that are vertically challenged.  This one has two steps but of course we could add a step or two onto this.  Only the top step has storage on this project but it could be modified to have storage on both steps.  The steps would be made slip resistant.

This particular step stool is 12 inches top to bottom, each step a mere 6 inches but could be adjusted. The steps are 7 3/8 from front to back.  The entire stool front to back is 13 1/2 inches and 13 inches wide.

Add several steps and make it more narrow… You have a dog step stool to get in the bed or the couch  store their toys and supplies in the storage compartment.