Great idea! I'll do that for mine while I'm building their new coop & run. Gives them something MORE to do. They've only had playground sand and hemp bedding thus far. :) They do enjoy dust bathing in the sand.
I'd wait until they are older to introduce new & fun things. Stick with chick crumbles and clean water for now. Holding them for a few minutes everyday (until they've had enough, they'll let you know!) is good so they bond with you.
May I suggest giving them a non-breakable mirror to hang...