pre-schoolers

I would love to hear how some of you handle your
pre-schoolers while you are trying to get
school done with your older kiddos.

Lucy has thoroughly enjoyed the big fat
workbook that I bought for her at Sam's...
though she doesn't exactly do it correctly...
but, who cares.

But that only carries her over for a short time.
She loves watching TV (of course)...which
I always feel guilty letting her do but golly,
it's such a life saver sometimes!!
The good thing is she really only likes videos
that have singing and dancing in,
so she can fully participate.
I count that as exercise...and exercise is good, right?!

Having a little one around is still so new to me,
especially when it means trying to
keep her occupied with something meaningful
while teaching my boys.

Any suggestions??