U
Untying someones shoelaces, then tying them together & getting them to chase after you - Can't do that with Velcro.

V
Veronica and Betty comic books of the Archie series

W
Wham-O was a toy manufacturer that marketed the plastic Hula Hoop, the flying disc: Frisbee, Slip-n-Slide, the SuperBall, AirBlaster, & Silly String - to name just a few

X
'X' marked the spot on all the treasure hunting maps we created as kids -- searching in the swamps for that X was not an easy task