8 years & up. Train your brain and put your memory skills to the test with Brainwaves! This set of compact, card-based games are designed and scientifically proven to exercise the brain to improve memory functions. These fun memory games engage in three different types of brain functions: fluid intelligence, working memory, and long-term memory. Players try to memorize characteristics on the suspect cards to identify the burglar in the Astute Goose. See how many pairs of the same animal portrait cards you can match in the Brilliant Boar. In the Wise Whale, lay down nine cards with colorful sea creatures to memorize then turn the cards face down and try to reveal a new card from the deck that matches.