Take a look at this wonderful site created by Tereza Neves. You'll find lots of vocabulary and grammar quizzes rated according to their difficulty level (easy, medium or difficult).
There are different topics to choose from, too: parts of the body, numbers, food, animals, etc.
Click on the image to get started!
These are some of the vocabulary activities you'll find.
(Click on each image for quick access)
Here's another one:
Click here to see the grammar section: