I've tried playing with chalk with Oliver many times. He's always interested in it for about one minute and then moves on to bigger and better things (like rocks, sticks, and leaves).
Today, I decided to use chalk to make a game. I call it "Chalk Shapes." I went outside and drew a purple triangle, a red (OK, pink) square, and a blue circle.
I gave Oliver simple directions to follow. I asked him if he could sit in the purple triangle, and he did:
I asked him to put his hands in the red square, and he put his hands on it (not bad!):
And I asked him to jump into the blue circle. Yes, Oliver (kind of) jumps now. He jumped in it and back out a couple of times before deciding my game was not very much fun.
He decided to ditch my "Chalk Shapes" game in favor of crunching some leaves. Then, a neighbor girl who is two years older than Oliver came by and played with the chalk. She told Oliver the name of all the shapes and drew some herself. Oliver gave her some sticks. So, apparently, my "Chalk Shapes" game is fun for some kids!
Because we already have chalk, I didn't lose anything by trying this game. It just didn't excite Oliver nor keep him busy. I give it a C grade.