Re: How could I make objects like sticker or toys glow in the dark?

Although you can find a number of recipies for glow in the dark solutions
in the chemical literature, most if not all would be toxic or irritating 
if they were not encapsulated in plastics. So the easiest and cheapest way 
to  make the items you've mentioned glow in the dark would be to pick up 
some darkroom tape from a local photo store. Professional stores that 
cater to photographers will have rolls of this tape which is adhesive on 
one side and can be cut to any length (the wide will be fixed at a couple 
of centimeters). It lasts virtually forever and holds a 'charge', that is 
continues to emit a green glow, for an hour or more.  The original use was 
finding controls and parts in a developing darkroom.