Crayola Jumbo Crayons are perfect for children under 3 years old because Crayola jumbo crayons are long and super thick and easy to hold and hard to break and I know that crayons children under 3 years old use are required to be jumbo because regular sized crayons are short and thin and easy to break and pose a choking hazard whereas Jumbo crayons are long and super thick and tough to break and does not pose a choking hazard. And I do collaborate with Crayola and I am even having them reintroduce the Kid's First Jumbo Washable Crayons forever and this is a good thing because crayons kids under 3 years old use are required to be jumbo. Kids have to be at least 3 years old in order to use regular sized crayons and kids also have to be at least 3 years old in order to play with Mr. Potato Heads too.