Krausen -- yes, nice active fermentation. Keep an eye on the airlock and make sure it does not get plugged up. If it does you will want to rinse with it purified water and then sanitize, refill with sanitized water or vodka and replace.
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This looks normal. Shove a piece of flex tubing in your stopper or if you have a large piece (read: big diameter) of tubing put it directly in the mouth of the carboy. Dip the other end in a small container of sanitizer fluid and let the yeast continue their work!