When our son sees our house and car keys he always wants to play with them, they keep him entertained longer than any of his other toys. The only problem is when he starts getting them in his mouth.
Since we started using Kleynimals we don't have to worry about that anymore. Kleynimals are non-toxic stainless steel "keys" that are safe for baby. Regular keys can have sharp edges and may contain lead and other hazards, Kleynimals do not contain lead, phthalates, BPA or cadmium.