VOVRU Invisible Ink Pen 24Pcs Spy Pen with UV Light Magic Marker Kid Pens for Secret Message and Birthday Party,Writing Secret Message for Easter Day Halloween Christmas Party Bag GiftBrand: VOVRU Color: Multicolor Features: INVISIBLE INK PEN: The ink is invisible after you write with it, unless you light on the cap blacklight to see the secret message perfectly. WRITE YOUR SECRET MESSAGE Once your secret message is written with this invisible ink pen, you just need to wait for a few seconds and use the light on pen cap to make the words appear, so funny and amazingyou can easily host a kid's birthday party favors stocking stuffer,