Felts of my daughter 2 years old, she uses almost every day and they work very well tjrs! Grip ergonomic and easy triangle to the beginnings of small hands. Beautiful quality and ink color. My choice was on them because possibility of linking them together and that's the big advantage is super convenient, more stray pens that eventually dry under a sofa and quickly sorted! in short the "must have". Too bad they are quite expensive because I had bought my promo supermarket 2 to 18. But definitely I will redeem large format box when his people have passed away one day ...