I have seen a lot of ways to make a game out of matching upper and lower case letters. Some match up with clothespins, others use paper, and some use lids. I took an idea from Teach Mama about alphabet letter lids and made it more visual for my son. I am sure there are versions of this out there, but I haven’t found an actual post of it. It is very easy! Here is what you will need: piece of poster board (cardboard or craft foam will work just fine), circle stickers, lids, and a marker.
Write upper and lower case letters on stickers. Put all of the upper case stickers on the board and all of the lower case stickers on the lids (or vice versa).
I would highly recommend using the same color lids, if you can. Their brains are already thinking and sorting letters, adding a bunch of colors to the equation may be a bit much to process. Grandma is a Diet Coke junkie (so am I) and it was easy for us to collect 26 silver lids.
Set the letters out on a flat surface next to the board and let your child match them up. When they match up the letters they place the lid over the sticker.
You may need to help your child out a little by handing them a lid one at a time. We learned that a few lids got confusing when playing. Lower case "d" and "p" got confused. Lower case "m" and "w" did as well.
My son had a lot of fun playing this game and requests it often. It has even been implemented in his preschool class, due to his rave review of it.