Thank you all, i found a site that teaches how to make shark teeth with silicone, the silicone becomes pliable maybe i will do with it, crayola clay is not for sale in Portugal if there should have another name.

Crayola seems to be more associated with the Americas. Here Eberhard Faber used to make FIMO (now it's Staedler), there are different kinds of Fimo now: the normal oven- hardend stuff, clay- and woodlike fimo that dries in the air... maybe one of them is similar? The oven- hardend variety is quiete expensive, though. I did find the english FIMO discription  http://en.wikipedia.org/wiki/Fimo
on Wiki and you can translate it in spanish, but not portugese, I fear. I think I noticed spanish among the different languages on the package, but as I speak neighter portugese nor spanish, I am afraid I can't help you more. FIMO (for the oven) is supposed to be similar to sculpey, does anyone know how those clays might be similar?

The Crayola Model Magic is an air dry clay.  Like Rikka mentioned you might have better luck finding FIMO.  Here is the reason though that people like the Crayola Model Magic.  First because you don't have to bake it.  Second because it is really light weight once it dries.  There is also a product called Creative Paper Clay.  It has the same qualities.  They are all kind of versions of the home made paper mache' mush or clays. People used to take paper and pulverize it in a blender.  Then they would add a binding compound like glue till it was like a clay. 

I found FIMO thanks Rikka, theres lots of online portuguese stores that sell FIMO.The oven variety costs 1.75€.

You're welcome! I use the airdry- variety, eigther as claylike or woodlike (which is esspecially recomended for puppets- and also more weight per €). Glad I could help you.

I also suggest the model magic... i made my teeth and horns on my current puppet out of model magic and they worked really well. you can see my avatar to see the teeth.

I also suggest the model magic... i made my teeth and horns on my current puppet out of model magic and they worked really well. you can see my avatar to see the teeth.

Yeah we all suggested that but apparently that product isn't available where she is.