Animal Jam relies on a fully implemented version of Adobe Flash to run, and the use of a mouse to play properly.
This means that Animal Jam is great for home computers and laptops like PCs or Macs, but not for tablet devices such as the iPad or Kindle Fire. Animal Jam may not run properly or at all on tablet devices, even if the tablet claims it supports Adobe Flash.
The tablet version of Minecraft is different as well because they do not update that version nearly as often as the PC version. I would recommend that you purchase a used laptop instead of a tablet for those two games.