Is there a geometric pictures of protosheaf and etale sheaf?
The protosheaf is defined as $(E,p,X)$ where $X$ is base and $p$ is a local homeomorphism on $S_i$ surjective on to $X$ with $\cup S_i=E$ and $S_i$ open in $E$.
Etale sheaf of abelian group is defined as $(E,p,X)$ as protosheaf along with the stalk $p^{-1}(x)=E_x$ is abelian group and the addition and inverse continuous.
Both of them look very weird. Protosheaf looks like a bundle but it is locally homeomorphic to the base open set locally whereas bundle locally looks like a product. Protosheaf looks like a fully discrete topology on one of the product. What kind of picture should I use to interpret the protosheaf?
I have no idea how to geometrically think Etale sheaf of abelian group or other kind of objects in $Ab$ category. How to interpret Etale sheaf of $Ab$ objects?