My niece is well into her hobby of card making and is asking me what glue would she need to to produce an envelope that can be sealed. ie. Glue that once applied will need licking to become 'sticky' again .......... and where can you purchase it!
the glue you want is called Lick 'n' Stick - it should be fairly widely available in places your niece would buy her card making stuff, but a place I use rather regularly is www.cheapdies.co.uk. p + p is free with orders over �10, the glue is �2.75 but she may want more than one or see something else that takes her fancy