Review on 🎨 Invisible Message Drawing Activity Enhancer by Andrew Davenport

We thought this would make a good birthday gift. We tried it at home, the pen glows in the dark. But of course it only glows when it's bright. Although you can see whether the sun is bright or the inner light is too bright, it is difficult to see the words that appear in the light. I understand the darker the better the result, but since the words couldn't be seen clearly under other bright lights, the girls quickly lost interest...