My ds is a very busy 18 month old! With my new baby, I find myself having less time to play with him and get household stuff done. What do you do/give to your little ones to keep them occupied? He likes to draw and build and do very boy things but he moves from one thing to another very quickly. What do you do when you are doing housework to keep your little ones busy???

Enlist their help! LOL!
seriously, a toddler can do things like fold facecloths, dust, put toys away, hand you clothes to put in the washer, etc.
make it like a game. give him mommy time as a reward.
sometimes, i even put in a half hour video.
If you are cleaning the bathroom, fill the tub a little with water and let him play with some tub toys in his bathing suit. you can wipe down the sink or toilet while he's playing.
just a few suggestions. :-D

I have 2 VERY busy boys, so I understand! I think if he is fairly content to play by himself then let him do that as well, but when your cleaning or doing laundry etc. you can give him do little tasks as Marezee suggested. I used to try and make sure when one boy was napping then I would focus on the other for a while. My oldest ds loved baking with me, so maybe he could help a little with that too! Does he like play dough? You can make your own!
My youngest ds has a toy vaccum cleaner, so when I am vacuuming he comes along right me with his vacumm :)
Recently I found this wonderful product made by crayola, it is called color wonder you can find it at Walmart or any of those places, it has paint brushes with the paint in there and coloring pens that only color on the paper it comes with, it is so nice as you don't have to worry about getting on your carpet or on them, no mess at all!
Also aqua doodle does some great products, we have one that is a big mat that comes with a Thomas train, you just put water into the pen and you make tracks on there for Thomas to go on! ( sorry not explaining myself very well) but that is a lot of fun!

I hope this helps!

I love the color wonder products---and so do my boys!

also, we had the aqua doodle thing, but the water pens got moldy! BLECH!