Why it's so hard to get your hands on the Christmas toy your kid really wants

 Some toy makers purposely hold back supply in an effort to drum up attention and incite a potential sales boost once more are released post-holidays, analysts said. 

from the LA Times

A mother who lived in Long Beach
found toys for her kids out of reach;
with lines round the block
and then out of stock,
she pulled out her hair with a screech.