We really didn't notice with our first child. We really chalked everything up to "splinter skills" (she learned a little of this, a little of that, but maybe couldn't connect the dots.) Her grandparents were the ones that said we must have worked hard with her make her so smart. We knew we hadn't forced her or been formal about her learning. So we began to think she was "advanced", but it wasn't until she started school and she was SO bored that we realized she was "gifted". Then it was confirmed through testing.