I bought these crayons for my twins boys who tend to eat regular crayons. These are the best crayons ever! They are a bit on the pricey side (about $6+ per box of 24. They also come in packages of 8 and 16), but well worth every penny! I actually bought each boy their own set because they fight over them in their box of regular crayons.
They are plastic barrels with crayons inside. You twist up the tip to color. When it wears down, twist some more and you get more crayon! These kept my boys from eating the crayons, breaking them and tearing off any paper wrappers.
The colors are bright, like you would expect from Crayola and coloring is smooth and even. One of my boys even likes to line the crayons up and count. They are using these crayons to learn their colors, too!
The crayon does come out of the barrel if you pull hard enough, but so far, my boys don't know they come out and have never tried it.
Crayola also makes twistables markers and colored pencils and when my boys get a little older, i will definitly be purchasing those as well! Thanks Crayola!