AYSO Return to Play training plans for various age groups here
Some more sample training plans:
U8 Dribbling 1, U8 Dribbling 2, U8 Dribbling 3
U10 Dribbling 1, U10 Dribbling 2
U10 Passing and Receiving 1, U10 Passing and Receiving 2
U12 Passing and Receiving 1, U12 Passing and Receiving 2, U12 Passing and Receiving 3