Please don't run your 2nd or 3rd grader around a lacrosse field beet red in the upper July 90's! Go to the pool, go fishing, boogie boarding! Meaningful club lacrosse starts in middle school. If they have that much interest, sign up for a short lax summer camp, where at least they are learning fundamentals from an experienced staff in a different setting. A half dozen organized games over Summer won't help improve skills for 8 and 9 year olds.