Rabbani and Solimene Photography/WireImag
08/17/2011 at 04:00 PM EDT
played doting dad to kids Ava, 11, and Deacon, 7, at Kidstock Music and Arts Festival, held at a private home in Beverly Hills. The actor seemed very attentive and encouraged his kids to participate in all the activities at the Hudson Jeans-sponsored event. Also there: Real Housewives of Beverly Hills
's Taylor Armstrong
, who helped daughter Kennedy
and her stepson make healthy homemade soda.