For sure break them into groups. Yes you need help to keep them moving and engaged. Fortunately you have 6 and 8 year olds where several parents can help without doing much harm. Example..A team I am coaching this year (7 & 8 year olds).. 12 kids in 3 groups stressing basic skills. We start this way One group works on catching and throwing to each turning glove side in a line One group is doing a two ball drill ..short easy pop up and charging a slow grounder 3rd group fielding short going 1 1 , going 4 and rotating. Then rotate the groups. Rotate again Hitting is the same way.. One group hitting off that funky stick or a tee One group hitting soft toss One group hitting live pitches You get a lot of basic skill practice in a short period of time this way. http://coaching-youth-baseball.com/ http://youth-baseball-bats.youth-baseball-equipment.com/