CP, you are talking about kids, cub scouts. They are too young to understand slides and all that. It is better if you take a few hand made (or MS Paint, or web search) pictures on A4 size sheets, like how a cricket field looks (with pitch drawn), pictures of a bat, a ball, wickets.
All you have to do is start telling them about similarities between cricket and baseball. They will understand that quicker. Like a base = crease. Pitcher = bowler. Batter = batsman. Fielders = Fielders. Then go to the differences, like shape of field, different type of outs, way of counting runs etc.
Once, I tried explaining cricket to my son's American friend and he didn't get it because I was talking only about cricket. Then I equated it with baseballs, told him the similarities, differences and he started getting the idea. Then I started all over again, this time explaining what every roles does, how runs are scored, how wickets are taken, and most importantly when does a team win. I told him about 2 formats, Test and ODI, but kept my explanations to ODI as learning about Test might have been too much for him (playing for 5 days to win! WTF!!)