ACT with children

I have used ACT for the last 6 months with adults but have just gained a new position as a Guidance Counsellor working with primary school children (aged 5-13) and their families. I was wondering if anyone could point me in the right direction regarding suitable resources to use with younger children. I have ordered the Greco book Accpetance and Mindfulness Treatment with Children and Adolescents. Any other suggestions greatfully received. Thank you.