nabi Pass was a subscription service from nabi, and the nabi Elev-8 came with six months subscription included in the price. It gave children unlimited access to the content, which included movies, music, apps, TV, eBooks, learning, games and videos.
nabi recently discontinued nabi Pass though. Both the nabi Pass and nabi Pass Tab services were discontinued on 4th December 2017, and subscription payments were discontinued on 1st November 2017.
nabi Elev-8 users with some, or all, of their six months subscription to nabi Pass left to run are being given a Google Play gift card, instructions for redeeming which can be found by opening nabi Pass in Mommy/Daddy Mode. Any apps or games downloaded through nabi Pass will not work from December 4th onwards.
For more information, check out the official FAQs.