Animal System - Cow Animal System - Cow Animal System - Cow Animal System - Martha Cow Brand New to the Little Humbug family, our COW reward system with 10 black patch tokens £26.50 Extra set of tokens: [Choose]Yes (+£3.50)No Personalised: [Choose]NoYes (+£2.50) If Yes, please specify name: Name 0 characters left. Quantity: at £26.50 each Meet Martha, our adorable cow reward system. Add a patch to Martha's tummy by inserting the tokens. To empty, simply tip up-side-down and give her a little shake. Martha comes with 10 black patch tokens and can be personalised with your little ones name too.