Being under a budget, this is what I use to take table top macro pictures. Unlike a Tenis ball which might not support the camera, this will reduce all camera shake, and is endlessly adjustable for even the tiniest changes in composition.
Plastic ziplock bag
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Step 1: Fill the Bag
Taking a ziplock bag, fill it with rice.
Leave enough empty space so the bag is still malleable, but has enough density to support a camera.
I recommend about 3/4 full.
Squeeze out any excess air, and presto.
Try it out.
It works like a dream. You have endless angles that can be made by simply shifting the rice around inside the bag, yet perfectly level images can be captured as well.