Can convicted child molesters be around children after prison?

They generally shouldn't be. Most convicted sex offenders who used children will have been banned from working with children anyway, and in the UK, I know they have to sign the sex offender's register, so if you know someone who is making you feel uncomfortable, you can check it to see if they are on there and you should always tell an adult you trust, whether the person are on there or not, so the adult can stop anything bad happening to you.