The actor appeared on the Born to Play stand for a photo call and Q & A session.
He commented: “Following my debut as Great Uncle Walter in the Christmas special, it is with great pleasure that I accepted the opportunity of joining Little Princess for Series three.
"I look forward to shouting about it at Toy Fair along with the launch of the new Little Princess toy range – Born to Play is the order of the day.”
Under the Born to Play brand, Martin Yaffe is launching a range of items from the spring/summer collection at Toy Fair 2009 and in store February 2009.
The range will include four assorted themed Little Princess beanies dressed in different outfits; a set of three beanies featuring Gilbert and Little Princess as well as a Little Princess Greenhouse Play House, based on the greenhouse in the show, plus lunchware and play balls.
New plush and pram sets are planned for autumn/winter 2009.