Like the Sculpey product, we had to try the Pluffy brand, they both do the same thing but the Pluffy is lighter and airy where as Sculpey is denser and a little tough in comparison. For my girls the Pluffy is softer and easier (I think) but for me the Sculpey is stronger and tougher - or at least the handling of it gives you that sense. Having said that both are great products and we all have loads of fun making things.
Cat by Melissa age 4.5
Mum (age unknown), Victoria age 2.5 and Melissa age 4.5