While painstakingly finishing the tower of coins, Riza and Will were both surprised when four kids all dressed in martial arts costumes came in from the garden doors. The four lead stars of the upcoming kiddie action series Kung Fu Kids invaded the famous yellow house and attempted to take down the precious tower of coins. But Riza and Will were quick to respond and called Ruben and Gaby for back up. The Big Four then all together protected their tower from the Kung Fu Kids who, because of their small size, managed to run away from the housemates' reach.

However, when the kids found it hard to defeat the grown ups, the Kung Fu Kids tried another tactic. They lured the Big Four into learning the Kung Fu dance choreo, but while the Big Four's attention were diverted, one by one, the kids tried to get close to the tower of coins. Fortunately, the housemates still outsmarted them and prevented them from carrying out their wicked mission. After some kulitans here and there, the Big Four still cooperated in learning the dance, while watching the kids from the corners of their eyes.

Afterwards, Big Brother called the kids into the confession room. The Big Four then took the opportunity to build a barricade using the Coke beach chairs around the tower of coins. Then later, they guarded all the entrance points in the garden, including the glass sliding door, the main gate, and the door to the activity area. From there, the Kung Fu Kids came out one by one and again tried take down the tower of coins.

In spite of the chaotic situation, the housemates seemed to have had a great time having children inside the house. Ruben enjoyed the kids' game, very much used to playing with his son while Riza and Gaby treated them like their nieces and nephews. On the other hand, Will used his height to his advantage in keeping the kids out of the tower's vicinity.

When the kids got tired, the housemates just toured their guests around Kuya's house and offered them some snacks to freshen up. But will the kids still pursue their mission to topple the coin tower?