Instead of giving your child birthday cards (which inevitably get lost), write your heartfelt sentiments for special occasions (birthdays, starting school, etc) in a journal...which will be a keepsake when they're grown!
Finally, why didn't i look this up sooner?! How to enable “Kid Mode” on iPad, iPhone, or iPod touch. You can lock kids into certain apps & disable parts of the screen so they can't click on the ads // awesome. Just set it up! SO easy!!