Want a T.M.X Elmo? Pay up. The must-have toy, an update of '96 hit Tickle Me Elmo, is selling for double its $39.99 price on eBay. Some "It" toys of the past:
1990s
POKEMON
Kids felt powerful because adults couldn't keep track of the characters on the trading cards
1980s
CABBAGE PATCH KIDS
At first turned off by the weird vegetal spawn, parents soon fought to "adopt" the dolls at the toy store
1970s
STAR WARS
The figurines sold out so fast that Kenner, their maker, started mailing out empty boxes with IOUs
1960s
G.I. JOE
The action figure made it...