My kids are growing like weeds. I swear the boy has grown 4 or more inches since the summer, the girl has grown a bit too and I'm trying to capture as much of their growing as possible. We move around a lot, so the whole tradition of scratching into a doorway's trim their height and dates isn't a feasible option to keep track of their growth. Also, they are very competitive with "who's taller?" even though they are 3 years apart in age, so this project is perfect. :)
Here is the inspiration here and she found them here. So, an idea popped into my head, I can make this myself for a whole lot less- and get a piece of art for the wall with the bonus of capturing the kids' growth. :) Yay!
Here it is. My version of the previous two links. I love the way it turned out.

Ignore the dog's food bin in the picture- we have a 200# mastiff, and this is the only thing that he can't get into and eat his food! ;)
The cost for this project was about $10- but you could do it for less if you have some of the supplies on hand; which I did, so it only cost me $6.
What you will need:
1) 1" x 8" x 6' board- I bought mine at Home Depot for $6
sandpaper
stain- left over from Oregon Art project
paint
brushes for stain and paint
sealer
stencils (optional)
picture hanger- bought these at Hobby Lobby- left over from Oregon Art project
Step 1: Sand your board- if desired. Mine had some rough edges and a stamp on it from the manufacturer on the side I wanted to use for my ruler.
Step 2: Stain board to desired depth of color. I ended up doing 2 coats for mine. Let cure. Mine took a couple of days because the weather was cold/rainy/damp for a few days after I began the process.
Step 3: Since my board is 6' long (Actually measured it at this point and it was 73" instead of 72"- so measure your board in case yours is off too. You could cut off an inch or so to make it 6' or you could leave it. Either way, it works.) I decided to make my tick marks at 2" intervals.
Step 4: I began my measurement with the bottom of the board is 6". The reasoning behind this, is because I will hang the ruler 6" from the ground, so starting from 0" would be unnecessary. So, the first tick mark is 8", second 10", third 1', etc.
Step 5: Decide on length of tick marks for varying heights. I ended up making my full foot measurements 3 3/4" long, 1/2 foot was 2 3/4" long and the remaining were 1 3/4" long. If this isn't clear, check the picture. :)
Step 6: Stencil in your numbers for the full foot measurements. Or you can skip this step if you are going to just paint them free-hand.
Step 7: Paint your tick marks and numbers. Let dry.
Step 8: Seal with acrylic sealer. Do this in a well ventilated area. I ended up with a headache from this and I did it in my garage. If you can do this outside- I would recommend that. :)
Step 9: Position your wall hanger on the back of your ruler, 1" from the top of your board.
Step 10: Hang on your wall- if you are using a 6" one that is actually 73" like mine is, I put the nail in at 6'6" so it lines up correctly.
That's it! :)
Enjoy your new art piece that will capture your kids' growth throughout the years- maybe even your grandkids too. :)