is a list of different programms in Bavaria (all in German). There are a few camps for 6 yr old kids. Let me know if you need any help with translations.
Otherwise, ask at the Tageselternservice
to give you adresses of qualified babysitters or Tagesmütter. I am sure there are more than enough teenagers/students/mothers happy to earn some money with kids care during August (unfortunately, my daughter is still too young / unexperienced to take this over, cause I am still looking for a way to keep her busy during holidays ... ).
By the way, I can highly recommend the yearly event of "Hüttenbauen"
(building huts)- at the Youth Center in Vaterstetten, from 4-7 August.