I saw
this idea on Brown Paper Packages and instantly knew I wanted to make one. I did things a little differently since I didn't have the same supplies she did.

We don't drink juice from a concentrate, so I didn't have 26 of those lids on hand. But . . . we do eat refridgerator biscuits - you know, those Pillsbury ones packed in a tube? So I used those instead. But they are much smaller, so a No. 10 can wouldn't work good with smaller circles. So I cleaned out an old infant formula can - I knew I saved those for a reason (but I had the "sample" size that I got in the mail from Similac, so the smaller size worked great with the biscuit lids.)
My daughter grabbed the inside rim yesterday and cut her finger, even though I thought I checked to see if it was smooth enough - guess not - so I would suggest sanding the inner rim down before giving it to your kiddos.
The other thing I did differently is I used letter die-cuts I've had for several years instead of printing them on the paper with the computer/printer.
The above picture didn't show it, but later I cut a slit in the lid so he can drop the letters in. I just used an exacto knife to cut through the plastic lid - worked great.
I showed it to my son when he got up from nap and there were a lot of wow's and smiles. He's just learning his letters so he loved seeing them on the metal lids that he could drop in the jar.

Then a few weeks later, I saw on her blog that she made something else with juice lids . . . a
color quiet book. So now, I guess I have to go out and start buying juice concentrate to get the larger lids.