Answer:
I am useless when together but useful when I am broken apart. What am I?
I am full of holes but still holds water.
I am used when you jump off a bridge for fun.
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I am a mini solar powered computer.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?