I bought this for my 3 year old who loves drawing and is starting to progress from "scribble" to pictures (when in the mood!) She loves it and dived straight in with her pen. We had a slight altercation when I rubbed out a bit of her drawing to demonstrate it could be deleted - apparently I should have asked permission! But she was soon happily tracing and rubbing out, tracing and rubbing out.
Then we had to go to work / nursery. That eveing when she came home she picked up the pen to do some more. But she had left the lid off (and in the usual rush to leave I hadn't noticed) and the pen had dried out, in about 10 hours! I was shocked and she was distraught. It was all my fault.
The next day I bought some white board pens from the pound shop, which had the added bonus of being in 5 different colours. Perfect - harmony was restored.
So - a recommended product, but get some spare pens in before you give it to your chuld, because let's face it every 3 year old is going to leave the lid off the pen at some point...!