Attaches cell phones and tablets to the airplane seat in front of you. Yes, you can fairly easily jury rig something for a single user with string, etc, but this has a ball joint, so it should be good for angling to share between two kids (my use case). Will not fit full size iPad — only iPad mini and similar sized tablets.

Also DAD15 for 15% off. Shipping is not free, but was reasonable $ 3.50 for me.

Good reviews on amazon [amazon.com].