My home made ones will be more on the simple side (I'm super cheap...) but I don't think Baby D will mind. I am thinking about getting the alphabet set though because $20 is really worth it to not have to hunt down 26 mini-somethings to match with letters. It's a great activity. I did something similar with Miss Dainty around 3 1/2.
This has been on my to do list, because lately, it's been a challenge to homeschool Miss Dainty. We used to do her schoolwork during Baby D's nap, but lately her naps are getting shorter and it seemed like we were cramming too much into a short hour (or hour and a half if we were lucky!) And because we were doing all the book type stuff during nap time, there was no opportunity to do Miss Dainty's favorite arts & crafts type activities because if the baby was up, she basically just wouldn't let us.
So, arts & crafts will be during Baby D's nap, and I need to figure out a way to do schoolwork while the baby is up. I'm putting together activity boxes that she will only be able to play with during school time, so that hopefully they will seem special enough to keep her interest.
I put a color sort activity set together yesterday:
Paint samples: free.
Container: free. (Repurposed take out container)
Items: free. They were just stuff we had around the house and buried at the bottom of the toy box. The marker lids came off of dried out markers (we definitely have enough of them.)
Rice: pennies? I only used 1.5 cups. And really, you don't even have to put it in there, but I did because Baby D is all about texture.