E-learning 'catchphrase' idea

First off, we have thought of an idea to start with.
The idea is based on the well known game of catchphrase!
This game have a picture hidden behind a number of grid boxes, when the user answers a question correctly, one of the boxes is removed.

We were thinking of building this into an animal theme, for young children. The questions would be simple and easy to understand with a selection of four different answers to choose from, with one being the correct answer. We were thinking about keeping the answers based on learning types of animals, so an example of a question would be:

What type of animal is a frog?
a)Mammal
b)Amphibian
c)Fish
d)Bird

if the user gets the correct answer, they get a piece of the picture, if they get it wrong, they start from the beginning.

To make this accessible, we would also need to define the meaning of each of the types of animal at the beginning, as without this we are relying that the user already has the knowledge before the start when they may not.