Hi there! I understand you’re having trouble downloading the Easybrain Jigsaw Puzzles app on your Amazon Fire tablet. Let’s work through this together.

First, just to clarify, is your Fire tablet a newer model? And which app store are you trying to download the app from — the Amazon Appstore or an alternative like Google Play? Also, are you connected to Wi-Fi when attempting the download?

Assuming you’re using the Amazon Appstore and connected to Wi-Fi, here are some steps to try:

1. Restart your tablet. This simple step often helps clear temporary glitches that can block downloads.

2. Force stop the Amazon Appstore and clear its cache:
- Go to Settings on your Fire tablet.
- Tap Apps & Notifications (or just Apps).
- Find Amazon Appstore or Silk Browser, tap it.
- Tap Force Stop.
- Then tap Storage and select Clear Cache.
- Go back and try the download again.

3. Check for software updates:
- Go to Settings > Device Options > System Updates.
- If an update is available, install it and then try downloading the app again.

4. Check Storage Space:
- Make sure you have enough free space on your tablet for the app. You can check this in Settings > Storage.

5. Try downloading from the Amazon website or direct link.
- Sometimes apps are available on the Amazon website where you can send them directly to your registered Fire device.

If after trying these your app still won’t download, it might be due to compatibility issues with the Fire OS (which is a variant of Android but sometimes does not support all apps from Google Play or even Amazon Appstore). The Easybrain Jigsaw Puzzles app is confirmed available on Amazon's app store, but if not showing up, sometimes regional availability or device model matters.

As a last resort, you could try sideloading the app (installing the app from an APK file), but this is a bit more advanced and I can guide you step-by-step if you’d like.

Could you let me know which step you’ve already tried or what exactly happens when you try to download? For example, does the download start and then fail, or does the app not show up at all in the store search? That will help me guide you better.

Looking forward to your reply!