London Bridge is Falling Down

My two boys went afternoon biking and roller blading.

The Gremlin pedaled his bike as his dad tried the roller blades (the first time).  The dad keeps falling and the Gremlin would get to his side and ask:
"How are you papa? Dont worry...".


One time the dad said "Dont come near me, if I fall I could hit you", that the Gremlin sung "London bridge is falling down". The dad suggested singing instead "Papa is falling down, falling down".