Give permission to user ONLY to install applications

I've been using linux for 6 years, but only now I had the task of creating 2 accounts into one PC. Those 2 accounts are Admin(Mine) and User(My Mother's), the problem is, when she tried to install an application Ubuntu ask for the admin password, but I want her to install and remove wathever software she wants but without all the admin permissions :S...

Is there anyway to do that ?

Thanks in Advance and sorry for my horrible english, Luis Da Costa

You can configure sudo not to ask for password for any executables you desire for any non admin user you select. Following procedure would make sudo/gksudo/gksu stop asking for password when user named "User" tries to install software CLI way (apt-get) and GUI way (Synaptic Package Mananager, Ubuntu Software Center):

Open /etc/sudoers using your favorite editor, gedit in this example

sudo gedit /etc/sudoers

At the end of /etc/sudoers add:

User ALL= NOPASSWD: /usr/sbin/synaptic, /usr/bin/software-center, /usr/bin/apt-get

Don't forget to replace "User" with desired non administrator user name. Good luck!