Q: My son's Ipad setup with my Apple Id but do not want my stuff to show on his tablet and versa

Hi to all.

Got my son and Ipad mini for xmast and to get him started quickly, just started his tablet with my own apple id and password as to allow him to have access to all of the apps that I bought for him on my Iphone.  Now, the problem is that whatever I do with my phone, such as taking pictures or texting is pushed to his tablet through Icloud and vice versa.  What we would both like is for him to keep having the possibility to keep on his tablet all the apps that I bought for him on my Iphone without having our respective stuff pushed to our respective devices all the time.  Is there any ways we can do that?

Thanks in advance for you time and hoping I have expressed my problem clearly.

Jean