Possible Clues:

• Topping game involves one in a blood transfusion
• A bid, perhaps, to get 'loo' regulated as a game
• That's the very devil to juggle with
• Game played in parts of India and Bologna
• Toy made to spin using two sticks joined by string
• Ring round, engaging half of boys for game
• Toy derived from the Chinese yo-yo
• [Call about bad smell on old top]
• String-and-spool toy
• Game over, then toss second over