First I like to make sure I have an area that has a lot of light.
I also make sure there is nothing in the background, having a bunch a stuff around is distracting
I've noticed if you point the camera from the top down on the toy it will look smaller
point it from the bottom up and the toy looks EPIC!!! ;p
like this:
Make sure the toy is centered and in focus, i don't use a fancy camera. Just my phone.
On most camera apps you can tap on the screen to get it to focus the camera.
If you want it to focus correctly you might have to get closer or backup.
and you will want to hold it as steady as possible. Maybe even make a stand out of blocks?
Once you take your picture you might want to make some adjustments.
I use a photo editing app on my phone. It lets my crop and play with the saturation and brightness.
Play around with those until you find something you like, and eventually it will become your signature look.