I also have perhaps half a dozen computer keyboards in various boxes around the house — but it's not the same thing. (slaw.ca)
This also lets you experiment with various box shapes and sizes as well as types and depth of litter in the box. (2ndchance.info)
Giving your little one several feet to wander and explore various boxes and bins of toys while you stay nearby is an excellent way to build independence and satisfy that natural curiosity. (verywellfamily.com)