Morfematic puzzle:
Materials: arrow shaped, interlocking, puzzle pieces (can easily be made DIY).
Puzzle pieces with morfematic components (root, conjugation etc.) are laid out on the table.
In groups the students make as many correct words as they can in the time allotted.
When the time is up, they present their words and their components.
This can be played as a warm-up or as a competitive game with a simple scoring system (1pt for a correct word and 1pt for a correct explanation).