My daughter discovered the suitcase aquadoodle when my goddaughter came to the house he we "missed" a pencil because both always wanted to use it ... and adults were conquered too! Then, the godfather of my daughter offered him for his 2nd birthday, and since then she never left. As it is light, it is easily transported through the house or outside, ideal to keep kids everywhere! The pen is very easy to fill with water, and it will not empty even when the child is dropped or shaken. In addition, it has the shape of a real pen (a little shorter) and the child can therefore take it as such: a great learning from an early age. The suitcase is flexible: it can hit, throw it down, stuck in the doors, walk on ... it remains intact. And since the outer surface is plastic, it is easily cleaned if it is dirty or stained. While drawing takes about 30 seconds to 1 minute to go, but when you have a face full of "slate", they attack each other, and the first is ready to be reused. Very well designed!