We do some purchasing of educations toys/devices, but not constantly. I am afraid those would be too little and too easy to steal. People would steal them even if they didn't understand about needing the base too.
Currently the library is looking at purchasing these early literacy stations (basically colorful computers with very kid specific programs) http://www.awelearning.com/en/markets/libraries/in-the-library/the-early-literacy-station/ (www.awelearning.com)