Does anyone know of, or remember a really old game for Mac?

I've been trying to Google to simply remember the name. I don't remember if it was on a floppy disc or not, and I was really young when my brother and I would play it.
I remember that you could go outside in a little backyard and play in a sandbox and dig up some sort of treasures with toy vehicles, or paint the backyard's fence and when the panting was completed, it would play the painted fence like a xylophone. I think there was a tree house of some sort, too? I can't really remember.