If you want to mount your iPad on the back of a seat, consider picking up ModulR's Car Headrest Strap. This strap attaches to ModulR's iPad 1 or iPad 2 case and locks around the headrest so that your kids can enjoy video, games, or other entertainment apps.
If you're looking for something even more integrated, you can have your iPad professionally installed in your car's dashboard, though this procedure will cost you quite a bit more than a strap accessory.
3. Distract Your Children and/or Cats
Kids and cats love iPads. Child-proof your tablet by enclosing it in a drop-proof case (preferably one that also has a screen cover), erasing all of your personal information (the last thing you want is your toddler accidentally sending email to your work clients), and downloading some kid-friendly apps, and then let your little ones go wild. Remember to enable the iPad's parental controls to prevent your children from accessing things you don't want them to access.
We bet you can come up with plenty of fun games for your kids, but check out Bartleby's Book of Buttons ($1), PBS Kids Video (free), Finding Nemo: My Puzzle Book ($2), and The Incredible Machine ($3).
If you have cats instead of kids, try Game for Cats, Cat Toy, and Pocket Pond HD, all of which are free. For maximum durability and continued entertainment, invest in a good iPad screen protector that can stand up to plenty of pawing and the occasional claw.
4. Turn Your Old iPad Into a Digital Picture Frame