Answer by  
                                                                                          flavored (88)
                                                            
                          
                          
                                                          Anything in multiples of 18 is perfect for a Bar Mitzvah gift.  The Hebrew word for "alive" is chai, and the value of the letters add up to 18.  18 is a lucky number.  So for example, $18 (or any multiple of 18 you find acceptable.)