Welcome Your Toddler into the Kitchen!

This isn't a huge DIY project but for anybody else that is currently dealing with the pick me up pick me up stage this could be helpful in being able to retain your sanity in the kitchen. 
I guess you could call it a toddler proof step stool. 

Materials:
IKEA step stool
2 - 1" x 3" board cut to 9 1/4"
1 - 1" x 3" board cut to 16"
4 - square 2" x 2" dowels cut to 17" (this can be changed based on how high your counter is. Doing it again I would actually do 18 inches so her little digits don't get caught between the counter and the stool). 
8 - 1 1/2" wood screws
4 - 1 3/4" wood screws
Whatever color paint you want - the glossier the easier to clean

I bought select pine boards from Home Depot as I thought that would retain shape from dings better than the common board pine they have. 

I apologize that I do not have the full process of putting it together but it is pretty self explanatory. We had to work a little bit backwards as we already had the stepstool from IKEA for a while but the joy of IKEA furniture is that you can take it apart!
I found one of the gazillion allen wrenches in my drawer (I have put a lot of IKEA furniture together...I mean a lot) and took the top step off the body. I then screwed the square dowels up through the bottom of the step so the screws will be hidden when  you reconnect the top. If you want the step to go back on the stool flat you will need to counter sink the screw hole so that the screw does not stick out. 

From there we screwed the side 9 1/4" inch boards into the dowels. You might need to two for this to spread the dowels so the boards are flush with the dowel edges. Once you do that you can push or pull in the sides to connect the front board. Easy as that!

Inga loved it from the get go and immediately learned how to sit down and crawl out of it. I have seen others where they put a dowel in the back as a brace....meh seems like a lot of extra work and she hasn't freaked out and frantically fallen backwards...

Since our step stool was already black, painting it was not really something I was all that excited about. When I went to buy the boards I checked the oops paint and what the hell, there is a black...ish semi-gloss paint for $2. Psch sold *throws money* TAKE MY MONEY!
Because the select pine boards are much better quality they have much sharper edges and corners so I just took a medium grit piece of sandpaper to it. Took about 5 minutes. 

All in all this cost:
$15 for IKEA step stool
$15 for Select pine boards (I bought one square dowel and one 1" x 3" board)
$2 Oops paint

Way cheaper than those crazy $100+ Montessori ones.