The baseball has over-emphasized seams that you can crimp or finger split on.
The tennis ball has under-emphasized seams so you can crimp them or grab it like a cobble.
The golf ball is a pinch/small cobble.
This novelty rock climbing holds set is great as challenging hand holds or big footholds for children on Vertical.
These rock wall parts will feel in the range of V4/V5 on a 45 degree wall.