• 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 amazing。you can easily host a kid's birthday party favors stocking stuffer, treasure hunt,escape room,or classroom activity complete with invisible ink clues!
• GREAT GIFT FOR FUN PARTY FAVORS：Parents can buy it for their kids party at home. Schools, teachers can buy it for students for a school activity. Add it for any surprise gift bag or as stocking stuffer.
• Halloween Party Goodies:Goody bags for kids spy party;Make a fun party favor; brings you an amazing variety of fun applications.Birthday Gifts,Halloween Gifts,Christmas Presents for kids and friends( Individual Packed).
• PACKAGE INCLUDES：24 reuseble invisible magic pens with built in lights. Batteries included and installed！