Emma Breeze said the needle was sticking out of the material of the £12 toy she bought for her son William from Mothercare's Festival Park store in Stoke-On-Trent.
She complained and returned the toy the following day but two weeks on, she is yet to receive an apology from the giant baby retailer.
Emma, 29, from Newcastle-under-Lyme, Staffordshire, said: 'I am always encouraging William to hold things and touch things and on that day I just happened to feel where his hand was when I felt something very sharp.
"When I looked at it again I saw that a needle was sticking out of the fabric.
"I couldn't believe it. Fortunately, he wasn't hurt but I dread to think what could have happened. It could have gone straight through his hand."
Her husband Lewis, 30, has made several attempts to contact the stores but to no avail. They are now planning to take their complaint to the Trading Standards.
Emma said: "This is very serious and I want some reassurance that it is being dealt with in the right way, but I have had nothing back from them. You just don't expect this from a company like Mothercare."
Parentdish has contacted Mothercare but has not yet received a comment.