Review on 🎩 Invisible Birthday Halloween Christmas: Unveil the Magic with VOVRU by Kazuki Vong

I bought these pens for my fourth graders. They're taking a standardized writing test in a few days, and recently we had to prepare for a writing camp. On the last day I gave them a gift bag. The biggest hit were these invisible handles. They had a great time writing down secret messages and making them magically appear in the black light. They spent a good 30 minutes with them. I will continue to buy these pens every year.