Guinea keets play time and treats in brooder

Hi my two week old keets seem healthy but can I throw some weeds with seeds in there to keep them occupied? I train them with millet which is working well. But do not want to throw that in there. Ive searched for things but not coming up with much. i just see millet millet millet. At this stage what else can they eat. I live on a big organic herb farm. lots of choice. thanks! also what do people use for bedding. I now ran across NOT to use hay or straw which is what i have been using and no pine shavings. what else is there...