$ sudo apt-get update
$ sudo apt-get install childsplay-alphabet-sounds-de 

childsplay-alphabet-sounds-de is installed in your system.

Make ensure the childsplay-alphabet-sounds-de package were installed using the commands given below,

$ sudo dpkg-query -l | grep childsplay-alphabet-sounds-de *

You will get with childsplay-alphabet-sounds-de package name, version, architecture and description in a table

childsplay-alphabet-sounds-de package basic information: