Split the group into equal teams. Set the cones up as shown in the diagram.
On the whistle players dribble around the cones, when they reach the end the dribble straight back to the end of the queue.
The player then has to roll the ball through the legs of their team to the person at the front of the queue.
Use different types of dribbles. Dribble to first cone, touch it then change hands and dribble backwards. Use a change of pace.
Good team defence is five players guarding the ball, not five separate one-on-ones. The shell drill is where that starts, so here is how to teach help-side positioning and rotations from the first week of the season.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.
Good spacing is only the start. The best modern offences teach players to attack the defence's rotations and play in a permanent 4-on-3 - here is how to coach that read.