This crossword puzzle is all about eggs! Learners use the given clues to fill in the squares in the puzzle. Since this is an online interactive resource, immediate feedback is available; although it only tells you whether you are wrong or right. Some of the vocabulary is scientific, and some is related to the subject of eggs in other ways. You would need to have focused quite heavily on the anatomy of an egg and the other topics for learners to be successful with this puzzle.