Martin can play the guitar and the horn.
Chris is Left Handed while Martin is Right.
Chris sucks his thumb in the butterfly episode.
Aviva Loves animals that is cute.
Jimmy is rarely seen in any episode without food at some point.
Koki likes to cut loose and go crazy like a Kratt Brother.
Martin eats disgusting food in one episode, so he is less scarred to eat new foods.
Chris gets a hug from Aviva on her birthday; Chris smiles during it.
Martin and Chris kids are played in the show as themselves, except for one of Chris boys.
Martin is the one who seems to know more than Chris at times.
Martin is a great Artist.
Chris loves to discover new animals. Even when it gets him in trouble.
Chris never gets back at Martin in the Hermit Shell Exchange
Jimmy can cook.
Koki and Aviva are really good friends, almost like sisters.
Martin is disorganized, but in some episodes is more prepared.
Chris is called a geek.
Martin is really good at extreme hide and seek.
Chris is scared of Martin (as seen in The Blue and the Gray, when Martin yelled at him to go and he jumped and said he was going.)
If you have more fun facts, please send them to me. THANKS.