Puzzles can help children to develop their scientific literacy. They can use their growing understanding of scientific terminology to create their own crosswords, word searches and games.
They could compile a list of key words from the topic, and write clues that require an understanding of the work they have done.
"When ice turns to liquid we call it... "
Some simple and inexpensive computer software is available that automatically generate puzzles. One such piece of software is available from www.crossword-compiler.com