My child was potty trained (or so we thought) but now he's been having some accidents, is this normal?

We were breathing easier once our child figured out how to use the toilet, but we actually didn't expect occasional accidents and near misses... so what's the deal?  Is this normal.  Any tips from other parents on re-potty training or getting through a slump? 

It's very common for children to have occasional accidents--maybe they're not paying attention or busy with something else--but accidents that continue may be a sign of stress, especially accidents at night.  And different children think differently about using the toilet--one might be shamed into it by a slightly older child, while another might not care and figure it's too much trouble.  Just keep a waterproof mattress pad on every bed the child (or children) gets into, even yours, because you never know. . . .