The stars have cleared out their tots' closets and handed over the items to bosses at the British Heart Foundation (Bhf), who are raising funds for vital research into inherited heart conditions through an eBay.com auction.
The items, as well as two signed books by funnyman David Walliams, will go under the hammer in the sale, which runs from 22 May (14) until 1 June (14).
Former pop star Sinitta, who has two children, Magdalena and Zac, says, "As a mother, I can imagine how terrifying it would be to learn that your baby has an inherited heart condition so it's vital that everything is done to reduce the number of children and families affected by these conditions.
"I'm glad that the clothes which don't fit Magdalena and Zac any longer can help the Bhf to fund life-saving research and hopefully these little donations can make a very big difference."
British Tv stars Stacey Solomon, Abbey Clancy and Angela Griffin have also donated items to the cause.