In the past couple weeks I made several graduation cards.
Here are some pictures, and links to their tutorials.
What I like about all of these,
is that you don't need any special 'graduation-themed' tools,
like stamps, punches, etc.
In all cases, some cardstock, a few basic tools and adhesive is sufficient.
They are gender neutral, and simple, but fun.
The following card is folded from black cardstock,
and shaped like a graduation cap.
The next card is one I came up with 2 years ago:
And my favorite,
with a pop-up graduation cap hidden inside:
It's kinda hard to take pictures of this one, the card folds completely flat,
and on the inside that whole cap folds out once opened.
Pretty neat if you ask me!
The person who designed it gives a pattern and good instructions: