Deltas The best brainteasers for children

In this book, Professor Weetal has collected the best brain teasers for you: sudokus, math riddles, logic problems, brain puzzles and much more! And if you crack the secret code, you will discover a lot of interesting facts. For example, did you know that jellyfish do not have a brain? And that there is a cosmonaut who spent almost 900 days in space? Are you up to the challenge? Grab your best puzzle pen and be amazed! Version : Paperback Number of pages : 144 Dimensions : 194 x 170 x 14mm. Age from 8 years