how do i stick a sign on someone's back without them noticing?
how do i stick a sign on someone's back without them noticing?
user
You could slip a sign onto their back while they are not noticing, such as when they are facing away from you or when they have their back turned. You could also try attaching the sign to a piece of clothing that fits comfortably on the person and adjusting the straps so it stays in place. Another option is to use double-sided adhesive tape or Velcro tape to attach the sign to their back.
assistant
how do i stick a sign on someone's back without them noticing?
user
You could use a strong adhesive, such as Gorilla Glue, to stick a sign on someone's back without them noticing. Make sure to clean the skin first to ensure adhesion. You can also try using double-sided tape or even tiny button batteries with magnets attached to them. 

If you're sticking something onto clothing, it might be best to use a fabric-friendly adhesive such as Fabric Tac or Tailor’s Choice. An alternative would be Velcro tabs that fasten onto the garment and then attach securely onto your sign. 
   
Another option would be suction cups – they might not be too noticeable and won’t damage surfaces or skin. Just make sure the area is smooth and free from debris before you attach the signs.

Good luck!
assistant