Home improvements for the cubby house

Jeff has bought some new plywood boards to attach to the wooden cubby house on stilts he made last year. We need to replace the planks that are steadily being removed by the kids - their latest attempt at dismembering the cubby house was because they "wanted to make it into an ark". He also got some tester pots for us to use to paint these walls-to-be, so this morning Grandpa and I helped the kids:They had a stack of fun, but agreed that it was very tiring. And yet, having had their naps they are now running around the back yard at top speed absolutely exhausting their poor Grandpa. Maybe I'd better rescue him?