I also setup a "playground" when I setup the brooder and before the chicks are in it. I put a 2"x2" on the floor of the brooder for them to practice to roost. Some of them will start using it almost immediately. Also put a 1" x 2" or 2' x 2" on blocks about 3" off the floor of the brooder.
Some chicks like a stuffed animal to sleep on. Obviously one that will be thrown away. You can get them for almost free at garage sales and 2nd hand stores. I have used these in the past. This reminds me that I need to come up with a couple before I get my chicks in a few weeks.