Sometimes you can hear them, but in all honesty, apart from a few bits of shell on the floor, I never saw mine..woke up in the morning, and they were there. Then every few hours there would be more. Enjoy it.. don't be tempted to 'help', it seldom does and remember, lockdown means no opening until it is time for the wee critters to come out (usually 18-24 hrs after hatching, but you will know).