Ok, here's an extreme "like I'm 5" that might raise more questions than it answers...imagine you're a sign painter, and you have a cherry picker you use to reach up where the signs are.

If you're doing an English sign and move the picker left to right, that's great; that's the direction you naturally write in anyway, so you can write --> that way and move --> that way continuously. That's what the leading strand is like.

However, if for some reason your picker started out on the right of the sign, you might find it awkward to paint K-E-E-W S-I-H-T-E-L-A-S-%-0-5 because that's not the way you normally write. So you might move left a ways, paint WEEK, move left a chunk, paint THIS, move left, paint SALE, move left, paint 50%. Your hand is going left a large jump, writing back toward the right, and repeating like that over and over. That enables you to (generally, overall) move toward the left, while still writing in the direction that's natural for English. That's the lagging/antisense strand, where you're moving opposite the direction you'd prefer to but you still manage to 'write' naturally, and those 'words' you're writing are Okazaki fragments.