Amazon Fire tablet 7 has been launched for a price of $49. However, it seems to lack some major features that are said to be unique to Android. Read more at theverge.com
It does not include many of the Google apps alums Google Maps, Google Photos or Google Drive. However, you can still enjoy these apps by installing it from outside.
The first step involves to enable installations from unknown sources. The second step involves manually downloading and installing Google Play services. You need to find the software version of your Amazon Fire tablet in order to download the right APK.