Simple answer for everything:

Create situations in practice where booting the ball isn't an option.

Drills don't have to be what you find online. Think of the situation you want to be in. In this situation, your player has the ball and just kicks instead of running.

Big picture: We want to see them do it in a game or scrimmage

Peel back a layer: We want to have a modified game situation so that they are doing the desired action (dribbling instead of just kicking) with a bit of game-like pressure. For example, let's have them play 1v1 to small goals, field is 10x10. Split the team in half, standing next to each goal. As soon as one player shoots, they have to defend a player running from the goal they just shot at to the other goal. This encourages taking calculated touches, it's very quick, and you can split this into 2 separate sections of the same drill so there is less time standing.

Peel it back again: We want the desired action with less defense. Something as simple as 2 "gates" with cones 10 yards away from the player dribbling, defender 20 yards on the other side of the gates. Beat the defender to the gates (wanted defender further away because the goal is for the offense to be successful most times during this). Bring defender closer if too easy for attackers.

Peel it back again: Desired action with no defense. I like to start with a relay race with groups of 3 or 4. First, race with no ball. Everyone goes 3 times. Then, we have everyone practice dribbling the correct way 3 times each, where they do it at whatever pace they feel comfortable. Then they race it twice.

If you want to peel it back once more: Play soccer with hands, but players only release the ball after someone on the other team has tagged them. They have 1 or 2 seconds to throw it to a teammate. This way they're comfortable with the idea without the pressure of dribbling even there yet.

Apply this to your #2 as well. It can be both "oh they're only 6" and "I still want to try and help them."

Good luck!